US2981279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum release valve
Assignee: Individual
•
Filing: 1957-09-20
•
Granted: 1961-04-25
•
Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Rudolph C Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:57
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0235; Y; Y10; Y10S; Y10S261/00; Y10S261/01; Y10S261/19; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7668; Y10T137/7722; Y10T137/7748; Y10T137/7749
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |