128 patents currently held

3 more in force are now held by other companies

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

2 more records may belong here and await a decision; they are not counted.

The next term ends in Jul 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jul 2027

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

notable patents fee due within 90 days all others 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

Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Method and System for Planning/Guiding Alterations to a Bone US 8,265,790

The most cited patent in this portfolio, cited by 509 later US patents, top 1% of utility patents granted in 2012 in our data. Protection runs to 2031.

Ends Jul 2031 · High confidence Also notable

Universal Positioning Device for Orthopedic Surgery and Method of Use Thereof US 8,277,455

Cited by 394 later US patents, top 1% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.

Ends Aug 2029 · High confidence Also notable

Bone and Tool Tracking in Robotized Computer-Assisted Surgery US 11,129,681

Cited by 74 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2039.

Ends Dec 2039 · High confidence

Formerly held, still cited

Notable

Glenoid Implant Surgery Using Patient Specific Instrumentation US 10,543,100

Cited by 71 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2035.

now held by Zimmer, Inc.

Ends Feb 2035 · High confidence

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.

2 fees due Dec 11 to 27, 2026 · next Dec 11
1 fee due Jan 11, 2027
The maintenance fee for Method and System for Validating Bone Alterations in Computer-Assisted Surgery (US 11,696,801) comes due Jan 11, 2027. Unpaid by Jul 12, 2027, it lapses early.
1 fee due Feb 25, 2027
The maintenance fee for Tracking System and Method (US 9,115,998) comes due Feb 25, 2027. Unpaid by Aug 25, 2027, it lapses early.
4 fees due Mar 10 to 29, 2027 · next Mar 10
3 fees due Apr 1 to 30, 2027 · next Apr 1
2 fees due May 14 to 21, 2027 · next May 14
1 fee due Jun 26, 2027
The maintenance fee for Patient-Specific Instrumentation and Methods for Ankle Arthroplasty (US 11,849,961) comes due Jun 26, 2027. Unpaid by Dec 27, 2027, it lapses early.
4 fees due Jul 9 to 16, 2027 · next Jul 9
2 fees due Aug 20, 2027
1 fee due Sep 5, 2027
The maintenance fee for Systems and Methods for Robotic Ankle Arthroplasty (US 11,918,237) comes due Sep 5, 2027. Unpaid by Mar 6, 2028, it lapses early.
1 fee due Oct 21, 2027
The maintenance fee for System and Method for the Registration of an Anatomical Feature (US 10,624,764) comes due Oct 21, 2027. Unpaid by Apr 21, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

11 of the patents on this record were granted since Aug 16, 2026
2 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 84 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Tracking System and Method	6 in force	to Nov 2031
Bone and Tool Tracking in Robotized Computer-Assisted Surgery	4 in force	to Dec 2039
Method and System for Pre-Operative Implant Sizing	4 in force	to May 2039
Patient-Specific Instrumentation for Implant Revision Surgery	3 in force	to Oct 2040
Computer-Assisted Surgery System and Method for Orienting a Knee Implant	3 in force	to Apr 2039

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,257,360	Determining Femoral Cuts in Knee Surgery In force Term ends Jul 3, 2027 · High confidence	In force	Term ends Jul 3, 2027	High confidence
US 7,877,131	Method for Providing Pelvic Orientation Information in Computer- Assisted Surgery In force Term ends Sep 22, 2027 · High confidence	In force	Term ends Sep 22, 2027	High confidence
US 7,715,602	Method and Apparatus for Reconstructing Bone Surfaces During Surgery In force Term ends Sep 30, 2027 · High confidence	In force	Term ends Sep 30, 2027	High confidence
US 11,583,224	Method and System for Tracking Tools in Computer-Assisted Surgery In force Term ends Feb 17, 2028 · Medium confidence	In force	Term ends Feb 17, 2028	Medium confidence
US 8,965,483	Cas System for Condyle Measurement In force Term ends May 29, 2028 · Medium confidence	In force	Term ends May 29, 2028	Medium confidence
US 11,116,577	Computer-Assisted Surgery System and Method In force Term ends Aug 17, 2028 · High confidence	In force	Term ends Aug 17, 2028	High confidence
US 11,771,502	Computer-Assisted Surgery System and Method In force Term ends Aug 17, 2028 · High confidence	In force	Term ends Aug 17, 2028	High confidence
US 8,814,875	Universal Positioning Device for Orthopedic Surgery and Method of Use Thereof In force Term ends Jan 13, 2029 · High confidence	In force	Term ends Jan 13, 2029	High confidence
US 10,251,653	Method and System for Planning/Guiding Alterations to a Bone In force Term ends Mar 25, 2029 · High confidence	In force	Term ends Mar 25, 2029	High confidence
US 11,224,443	Method and System for Planning/Guiding Alterations to a Bone In force Term ends Mar 25, 2029 · High confidence	In force	Term ends Mar 25, 2029	High confidence

10 of 128 patents shown.

Pro members see all 128.

Pro members: see all 128 patents

Also on record, not counted in the 128: 3 patents in force now held by others · 27 patents ended · 41 applications pending · 38 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built

Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.

Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Export every term end as CSV · Pro

Orthosoft Inc.