Also listed on Contech Stormwater Solutions Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Dec 8, 2016 (Wells Fargo Bank, National Association).
Term ends Sep 26, 2027 · High confidence
20-year base term ended Oct 19, 2024
Held by Contech Engineered Solutions LLC
Filed Oct 19, 2004 as application 10/968,707 · Granted Sep 21, 2010
Base term plus 1072 days of patent term adjustment (USPTO delay)
Today
2004
2027
Clock starts
Oct 19, 2004
Oct 19, 2004
Term ends
Sep 26, 2027
Sep 26, 2027
Granted
Sep 21, 2010
Sep 21, 2010
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,072
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 1072 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Oct 19, 2004, when this application, 10/968,707, was filed | Oct 19, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1072 days, USPTO patent term adjustment record | Sep 26, 2027 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 26, 2027 | High confidence |
This family
| US 7,799,235 | this patent Sep 2027 | Sep 2027 |
| Application PCT/US2005/025485 | PCT application no patent term | no patent term |
| Application 12/854,484 | Abandoned not computed | not computed |
| Application 13/488,732 | Abandoned not computed | not computed |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 19, 2004 Reel 15917, frame 973 | McLaughlin, Brian R.; Allen, Vaikko P., II; Cobb, Daniel P.; Berg, Derek M. | Vortechnics, Inc. | Assignment of Assignor's Interest |
| Oct 19, 2004 Reel 15919, frame 16 | Olson, Norman L. | I.S.C. Environmental, Inc. | Assignment of Assignor's Interest |
| Feb 14, 2005 Reel 15676, frame 415 | Vortechnics, Inc. | Wachovia Bank, National Association, as Administrative Agent | Notice of Grant of Security Interest |
| Feb 3, 2006 Reel 17115, frame 403 | Wachovia Bank, National Association, as Administrative Agent | Vortechnics, Inc. | Termination of Security Interest in Patents |
| Mar 8, 2006 Reel 17275, frame 45 | Keystone Retaining Wall Systems, Inc.; Armortec, Inc.; Contech Arch Technologies, Inc.; Contech Technologies, Inc.; Petratech, Inc.; Stormwater Management, Inc.; Vortechnics, Inc. | Wachovia Bank, National Association, as Administrative Agent | Security Agreement |
| Oct 12, 2006 Reel 18375, frame 666 | Vortechnics, Inc. | Contech Stormwater Solutions Inc. | Merger |
| Sep 22, 2010 Reel 25026, frame 472 | Contech Construction Products, Inc.; Contech Bridge Solutions Inc.; CDS Technologies, Inc.; Contech Earch Stabilization Solutions Inc.; Contech Technologies, LLC; Contech Trucking & Logistics, LLC; Safety Precast, Inc.; Superior Drainage, LLC; West Texas Culverts, Inc.; Thompson Culvert Company; Armortec, LLC; Keystone Retaining Wall Systems, Inc.; Alliance Construction Products Inc.; Contech Stormwater Solutions Inc. | Wells Fargo Bank, N.a. | Security Agreement |
| Feb 3, 2012 Reel 27650, frame 174 | Contech Stormwater Solutions Inc. | Contech Stormwater Solutions LLC | Centificate of Conversion |
| Feb 21, 2012 Reel 28014, frame 952 | Contech Engineered Solutions LLC; Contech Bridge Solutions LLC; Contech Stormwater Solutions LLC; Keystone Retaining Wall Systems LLC; CDS Technologies LLC; Contech Earth Stabilization Solutions LLC | Wells Fargo Capital Finance, LLC | Security Interest |
| Aug 7, 2012 Reel 28735, frame 632 | Conech Stormwater Solutions LLC | Contech Engineered Solutions LLC | Merger |
| Jun 18, 2013 Reel 30634, frame 40 | Keystone Retaining Wall Systems LLC; Contech Engineered Solutions LLC; Imbrium Systems LLC | Goldman Sachs Lending Partners LLC | Notice of Grant of Security Interest in Patents |
| Aug 7, 2013 Reel 30964, frame 588 | Wells Fargo Bank, National Association | Contech Engineered Solutions LLC (F/K/A Contech Construction Products Inc.); Keystone Retaining Wall Systems LLC (F/K/A Keystone Retaining Wall Systems Inc.); Contech Trucking & Logistics, LLC | Release of Security Interest |
| Aug 7, 2013 reel/frame not recorded | Wells Fargo Bank, National Association | Contech Engineered Solutions LLC (F/K/A Contech Construction Products Inc.) | Release of Security Interest |
| Aug 7, 2013 reel/frame not recorded | Wells Fargo Bank, National Association | Keystone Retaining Wall Systems LLC (F/K/A Keystone Retaining Wall Systems Inc.) | Release of Security Interest |
| Aug 7, 2013 reel/frame not recorded | Wells Fargo Bank, National Association | Contech Trucking & Logistics, LLC | Release of Security Interest |
| Nov 30, 2016 Reel 40741, frame 458 | Goldman Sachs Lending Partners, LLC | Contech Technologies, Inc. | Release of Security Interest |
| Dec 2, 2016 Reel 40796, frame 939 | Goldman Sachs Lending Partners, LLC | Contech Engineered Solutions, LLC | Release of Security Interest |
| Dec 2, 2016 Reel 40797, frame 514 | Wells Fargo Capital Finance, LLC | Contech Stormwatersolutions, LLC | Release of Security Interest |
| Dec 8, 2016 Reel 40852, frame 262 | Contech Engineered Solutions Inc. | Wells Fargo Bank, National Association, as Agent | Security Interest |
| Feb 10, 2025 Reel 70170, frame 919 | Best Block, LLC; Contech Engineered Solutions LLC; Custom Building Products, LLC; Forterra Concrete Products, LLC; Forterra Pipe & Precast, LLC; Keystone Retaining Wall Systems LLC; Pavestone, LLC; The Quikrete Companies, LLC; United States Pipe and Foundry Company, LLC; Usp Holdings, LLC | U.S. Bank Trust Company, National Association | Patent Security Agreement |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2027
Term ends Sep 26, 2027. No further fees fall due before then
Note
The 1072 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
49
later US patents cite this one
That is top 25% of utility patents granted in 2010 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.