Patent US5620334A successfully refreshed from Google Patents.
US654569A
Expired / Lapsed
US
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Fluid-pressure-regulating device.
Assignee: Westinghouse Air Brake Co
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Filing: 1900-05-08
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Granted: 1900-07-24
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Expires: 1920-05-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:24
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7767
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) | 1903-07-24 | 1904-01-23 | 1904-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-07-24 | 1908-01-23 | 1908-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-07-24 | 1912-01-23 | 1912-07-24 | $7700.00 | Window Closed / Lapsed |