US3457864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control for installation in wells
Assignee: BERNARD F PRICE
•
Filing: 1967-05-01
•
Granted: 1969-07-29
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Bernard F Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:36
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/022; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE301145C
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US2621608A
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US2847939A
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US3141475A
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US3065698A
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US3191536A
Cited
US3295450A
Cited
US3363572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |