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Patent US1754946A successfully refreshed from Google Patents.
US1754946A
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Well-flowing apparatus
Assignee: Tide Water Oil Co
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Filing: 1928-02-20
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Granted: 1930-04-15
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Expires: 1948-02-20
Abstract
No abstract record available.
Inventors
- 👤 Richard M Haskell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-04-14 | 1933-10-14 | 1934-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-14 | 1937-10-14 | 1938-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-14 | 1941-10-14 | 1942-04-15 | $7700.00 | Window Closed / Lapsed |