Patent US656981A successfully refreshed from Google Patents.
US656981A
Expired / Lapsed
US
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Throttle-valve for fluid-operated tools.
Assignee: JOHNSON PARFITT TOOL Co
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Filing: 1900-02-02
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Granted: 1900-08-28
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Expires: 1920-02-02
Abstract
No abstract record available.
Inventors
- 👤 Charles Harris Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04
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) | 1903-08-28 | 1904-02-27 | 1904-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-08-28 | 1908-02-27 | 1908-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-08-28 | 1912-02-27 | 1912-08-28 | $7700.00 | Window Closed / Lapsed |