US3040771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: Individual
•
Filing: 1959-04-10
•
Granted: 1962-06-26
•
Expires: 1979-04-10
Abstract
No abstract record available.
Inventors
- 👤 Howard A Droitcour
- 👤 John M Droitcour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:28
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7767; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928; Y10T137/8593; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US487991A
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US1305964A
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US781913A
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US1124113A
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US1804060A
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US2059257A
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US2470372A
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US2827075A
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US2564815A
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US2619111A
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US2688977A
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US2807274A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |