US2859031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibrated spring adjusting mechanism for relief valves
Assignee: Crane Co
•
Filing: 1955-07-13
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Granted: 1958-11-04
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Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 George E Hansen
- 👤 Edward W Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:40
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/06; F16K15/00; F16K15/02; F16K15/025; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/7722; Y10T137/7837; Y10T137/7878; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7938
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |