US1640620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Governor for pressure-fluid-operated tools
Assignee: WILLIAM H KELLER Inc
•
Filing: 1925-08-29
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Granted: 1927-08-30
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Expires: 1945-08-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Shaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14; B25D9/16; F; F16; F16K; F16K15/00; F16K15/02; F16K2200/00; F16K2200/40; F16K2200/401; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7837; Y10T137/7847; Y10T137/7848
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) | 1930-08-29 | 1931-02-28 | 1931-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-29 | 1935-02-28 | 1935-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-29 | 1939-02-28 | 1939-08-30 | $7700.00 | Window Closed / Lapsed |