US3422840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve with resilient seal means
Assignee: Grove Valve and Regulator Co
•
Filing: 1966-01-17
•
Granted: 1969-01-21
•
Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Austin U Bryant
- 👤 Richard S Brumm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; F16K17/0466; F16K17/0493; F16K17/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/71; Y10T137/7722; Y10T137/7738; Y10T137/7837; Y10T137/7854; Y10T137/7856; Y10T137/7904; Y10T137/7922; Y10T137/7929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254209A
Cited
US1229885A
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US1772107A
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GB465178A
Cited
US2320339A
Cited
US2279002A
Cited
US2641871A
Cited
GB706112A
Cited
US2695032A
Cited
US3074425A
Cited
US3025874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |