Patent US3454886A successfully refreshed from Google Patents.
US3454886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controller with widely variable reset time
Assignee: Shell USA Inc
•
Filing: 1967-05-08
•
Granted: 1969-07-08
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Aart Bijl
- 👤 Hendrikus J Nihof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:41
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/44; G; G01; G01R; G01R19/00; G01R19/30; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186; G06G7/1865; G06G7/22; G06G7/26; G06G7/28; G06G7/48; G06G7/78
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2656498A
Cited
US3355644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |