Patent US2980132A successfully refreshed from Google Patents.
US2980132A
Expired / Lapsed
US
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Safety relief valve
Assignee: Borg Warner Corp
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Filing: 1957-11-25
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Granted: 1961-04-18
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Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Edward A Prijatel
- 👤 Henry H Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/06; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7738; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |