US2992652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: LOUIS F GUENTHER
•
Filing: 1956-11-01
•
Granted: 1961-07-18
•
Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Hans W Fellberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:18
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T11/32; B60T11/326; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2655
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2225081A
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US2736332A
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GB361532A
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GB482935A
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GB539895A
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US2246621A
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US2604900A
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GB667180A
Cited
US2776812A
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US2773511A
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US2710620A
Cited
US2778373A
Cited
US2906281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |