US2981347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater inspection apparatus
Assignee: ConocoPhillips Co
•
Filing: 1956-11-16
•
Granted: 1961-04-25
•
Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Robert F Bauer
- 👤 Stratton Hal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1976264A
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US2476309A
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US2650068A
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US2698095A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |