US2780071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure for use in conjunction with gas odorant systems
Assignee: Individual
•
Filing: 1952-10-29
•
Granted: 1957-02-05
•
Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jose B Calva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; Y; Y10; Y10T; Y10T137/00; Y10T137/4891; Y10T137/7722; Y10T137/7738; Y10T137/7741; Y10T137/8593; Y10T137/877; Y10T137/87901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2322617A
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US2355550A
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US2416537A
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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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |