US2912011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure
Assignee: Individual
•
Filing: 1956-08-02
•
Granted: 1959-11-10
•
Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Fred G Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:15
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0003; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266; F; F15; F15B; F15B21/00; F15B21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743; Y10T137/86863; Y10T137/87265; Y10T137/87298; Y10T137/87322; Y10T137/87523; Y10T137/87917; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5158; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/36; Y10T408/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934932A
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US1805056A
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US1924886A
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US2093692A
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US2150077A
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GB554311A
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US2377473A
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US2510356A
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US2649113A
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US2653625A
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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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |