US2604945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump anchor
Assignee: Page Oil Tools Inc
•
Filing: 1948-03-12
•
Granted: 1952-07-29
•
Expires: 1968-03-12
Abstract
No abstract record available.
Inventors
- 👤 John S Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B23/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1066000A
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US1140789A
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US1785123A
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US1772682A
Cited
US2053065A
Cited
US2153934A
Cited
US2067499A
Cited
US2144046A
Cited
US2496546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |