Also listed on Prad Research and Development Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 28, 2030 · High confidence
20-year base term ends Oct 8, 2029
Filed Oct 8, 2009 as application 12/575,970 · Granted Oct 30, 2012
Base term plus 232 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Oct 8, 2009
Oct 8, 2009
Term ends
May 28, 2030
May 28, 2030
Granted
Oct 30, 2012
Oct 30, 2012
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
232
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.
This patent's term runs 232 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 8, 2009, when this application, 12/575,970, was filed | Oct 8, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +232 days, USPTO patent term adjustment record | May 28, 2030 | 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 | May 28, 2030 | High confidence |
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 |
|---|---|---|---|
| Dec 8, 2009 Reel 23622, frame 36 | Hajibeygi, Hadi; Bonfigli, Giuseppe; Hesse, Marc Andre; Jenny, Patrick | Chevron U.S.A. Inc.; Schlumberger Technology Corporation; Eth Zurich; Schlumberger Canada Limited; Services Petroliers Schlumberger; Logined B.V.; Prad Research and Development Limited | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Chevron U.S.A. Inc. | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Schlumberger Technology Corporation | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Eth Zurich | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Schlumberger Canada Limited | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Services Petroliers Schlumberger | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Logined B.V. | Assignment of Assignor's Interest |
| Dec 8, 2009 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Prad Research and Development Limited | Assignment of Assignor's Interest |
| Sep 24, 2012 Reel 29011, frame 581 | Hajibeygi, Hadi; Bonfigli, Giuseppe; Hesse, Marc Andre; Jenny, Patrick | Chevron U.S.A. Inc.; Schlumberger Technology Corporation; Eth Zurich | Assignment of Assignor's Interest |
| Sep 24, 2012 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Chevron U.S.A. Inc. | Assignment of Assignor's Interest |
| Sep 24, 2012 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Schlumberger Technology Corporation | Assignment of Assignor's Interest |
| Sep 24, 2012 reel/frame not recorded | Bonfigli, Giuseppe; Hajibeygi, Hadi; Jenny, Patrick; Hesse, Marc Andre | Eth Zurich | Assignment of Assignor's Interest |
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
May 2030
Term ends May 28, 2030. No further fees fall due before then
Note
The 232 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
48
later US patents cite this one
That is top 25% of utility patents granted in 2012 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.