US3492007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load balancing full opening and rotating blowout preventer apparatus
Assignee: Hughes Tool Co
•
Filing: 1967-06-07
•
Granted: 1970-01-27
•
Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 Howard W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:24
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; E21B33/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2176355A
Cited
US883155A
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US2192805A
Cited
US2479265A
Cited
US2846247A
Cited
US3387851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |