Patent US3447777A successfully refreshed from Google Patents.
US3447777A
Expired / Lapsed
US
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Valve construction
Assignee: Monogram Industries Inc
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Filing: 1966-02-02
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Granted: 1969-06-03
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Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:05
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/46; F16K31/465; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K27/00; Y; Y10; Y10T; Y10T403/00; Y10T403/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US635442A
Cited
US737941A
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US1458816A
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GB415849A
Cited
US2234602A
Cited
US2375548A
Cited
US2449167A
Cited
US3022517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |