Patent US3435797A successfully refreshed from Google Patents.
US3435797A
Expired / Lapsed
US
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Compressed air,pressure-sensing actuator
Assignee: ConocoPhillips Co
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Filing: 1967-05-03
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Granted: 1969-04-01
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Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 William L Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:52
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/56; B63B21/66; B63G; B63G8/00; B63G8/14; B63G8/18; B63G8/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |