Patent US2693974A successfully refreshed from Google Patents.
US2693974A
Expired / Lapsed
US
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Well valve
Assignee: Guiberson Corp
•
Filing: 1947-06-23
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Granted: 1954-11-09
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Expires: 1967-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond G Taylor
- 👤 Thomas B Losey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:37
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32549; Y10T403/32557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2323989A
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US2409812A
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US2361701A
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US2450822A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |