US2995147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: Individual
•
Filing: 1958-01-31
•
Granted: 1961-08-08
•
Expires: 1978-01-31
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Bergquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; F16K17/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3118; Y10T137/7722; Y10T137/7738; Y10T137/7744; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE18850E
Cited
US1690097A
Cited
US1836416A
Cited
US2317395A
Cited
US2530091A
Cited
US2517858A
Cited
US2527381A
Cited
US2827925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |