Patent US991530A successfully refreshed from Google Patents.
US991530A
Expired / Lapsed
US
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Air-valve.
Assignee: Individual
•
Filing: 1910-02-21
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Granted: 1911-05-09
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Expires: 1930-02-21
Abstract
No abstract record available.
Inventors
- 👤 Charles E Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/044; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/3102; Y10T137/3105; Y10T137/7287; Y10T137/7329; Y10T137/7339; Y10T137/7355; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1914-05-08 | 1914-11-07 | 1915-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-05-08 | 1918-11-07 | 1919-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-05-08 | 1922-11-07 | 1923-05-09 | $7700.00 | Window Closed / Lapsed |