Patent US1473474A successfully refreshed from Google Patents.
US1473474A
Expired / Lapsed
US
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Outlet valve for tank cars
Assignee: PENNSYLVANIA TANK CAR Co
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Filing: 1920-01-07
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Granted: 1923-11-06
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Expires: 1940-01-07
Abstract
No abstract record available.
Inventors
- 👤 Drake Whittlesey Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:51
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/07; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/863; Y10T137/86308
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) | 1926-11-05 | 1927-05-07 | 1927-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-05 | 1931-05-07 | 1931-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-05 | 1935-05-07 | 1935-11-06 | $7700.00 | Window Closed / Lapsed |