US2949861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping rig and method
Assignee: Individual
•
Filing: 1956-07-27
•
Granted: 1960-08-23
•
Expires: 1976-07-27
Abstract
No abstract record available.
Inventors
- 👤 Harry C Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
F; F04; F04B; F04B47/00; Y; Y10; Y10S; Y10S417/00; Y10S417/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US374995A
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US1334935A
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US1708584A
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US1906933A
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US2051089A
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US2133655A
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US2341864A
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US2365281A
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US2683424A
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US2797642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |