US1920596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic actuating and control valve means
Assignee: National Automatic Tool Co Inc
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Filing: 1929-02-19
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Granted: 1933-08-01
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Expires: 1949-02-19
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:01
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30585; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/329; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/71; F15B2211/78
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) | 1936-07-31 | 1937-01-30 | 1937-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-31 | 1941-01-30 | 1941-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-31 | 1945-01-30 | 1945-08-01 | $7700.00 | Window Closed / Lapsed |