US2994337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diapinch valve for hazardous materials
Assignee: Individual
•
Filing: 1958-03-04
•
Granted: 1961-08-01
•
Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Robert R Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:15
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06; F16K7/061; Y; Y10; Y10T; Y10T137/00; Y10T137/5762; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1128327A
Cited
US1872792A
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US1772210A
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US2069261A
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US2769397A
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US2843349A
Cited
US2786608A
Cited
US2904063A
Cited
US2876937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |