US2838064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety guard for valves
Assignee: Individual
•
Filing: 1956-05-14
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Granted: 1958-06-10
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 Charles E Schieberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:15
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/12; F16K35/00; F16K35/10; F16P; F16P1/00; F16P1/02; Y; Y10; Y10S; Y10S292/00; Y10S292/02; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T292/00; Y10T292/82; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5615; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20876; Y10T74/2093
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |