Patent US3504701A successfully refreshed from Google Patents.
US3504701A
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Valve assembly and method of installation
Assignee: Westinghouse Bremsen und Apparatebau GmbH
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Filing: 1967-11-22
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Granted: 1970-04-07
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Expires: 1987-11-22
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:37
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/028; F16K17/00; F16K17/02; F16K17/04; F16K17/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1784822A
Cited
US2672009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |