Patent US2889886A successfully refreshed from Google Patents.
US2889886A
Expired / Lapsed
US
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Well head
Assignee: Individual
•
Filing: 1956-01-23
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Granted: 1959-06-09
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Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Jay P Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:54
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1859793A
Cited
US1944573A
Cited
US1944840A
Cited
US2157964A
Cited
US2118094A
Cited
US2335355A
Cited
US2589373A
Cited
US2623467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |