Patent US841469A successfully refreshed from Google Patents.
US841469A
Expired / Lapsed
US
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Pressure-controlling valve for air-brake systems.
Assignee: Westinghouse Air Brake Co
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Filing: 1903-07-06
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Granted: 1907-01-15
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Expires: 1923-07-06
Abstract
No abstract record available.
Inventors
- 👤 Walter V Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:07
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7768
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) | 1910-01-14 | 1910-07-16 | 1911-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-01-14 | 1914-07-16 | 1915-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-01-14 | 1918-07-16 | 1919-01-15 | $7700.00 | Window Closed / Lapsed |