US3478829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop rotation mechanism attachment
Assignee: Phillips Drill Co Inc
•
Filing: 1968-04-29
•
Granted: 1969-11-18
•
Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:10
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539610A
Cited
US2936736A
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US3104745A
Cited
US3171523A
Cited
US3181669A
Cited
US3197002A
Cited
US3370655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |