One patent currently held, every record listed here
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.
The next term ends in Feb 2037. from the record
Of the 3 now held by other companies, 2 name Cameron International Corporation as their current owner, and 1 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Feb 2037
Next term end
1
Patent families
When these terms end
Each bar runs from grant to computed term end. 2020 to 2038.20242028203220362038
Every computed term in this portfolio is shown above.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Only 1 of the currently held patents qualifies as notable.
Formerly held, still cited
Notable
Ends May 2037 · High confidence
The most cited patent in this portfolio, cited by 20 later US patents, top 10% of utility patents granted in 2020 in our data. Protection runs to 2037.
now held by Cameron International Corporation
Also notable
Ends Jul 2037 · High confidence
Cited by 3 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2037.
now held by Schlumberger Technology Corporation
Also notable
Ends Jan 2038 · High confidence
Granted 2021. Computed term ends 2038.
now held by Cameron International Corporation
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
Grouped by real patent family, largest first, labeled by the earliest filing in each. No technology classification is inferred from titles.
| Wellhead Assembly with Internal Casing Hanger Pack-Off | 1 in force | to Feb 2037 |
Patents held now
Soonest term end first.
Showing 1 to 1 of 1
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,669,803 | Wellhead Assembly with Internal Casing Hanger Pack-Off In force · High confidence | In force | High confidence |
Also on record, not counted in the 1: 3 patents in force now held by others. 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.