US2884004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene relief valve
Assignee: Union Carbide Corp
•
Filing: 1954-02-23
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Granted: 1959-04-28
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Paul R Dierdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/168; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/18; F16K15/182; F16K2200/00; F16K2200/30; F16K2200/303; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876; Y10T137/7904; Y10T137/7922; Y10T137/7923; Y10T137/7929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US924341A
Cited
US1993195A
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US2320444A
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US2536691A
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US2660834A
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US2602631A
Cited
US2755817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |