Patent US2581997A successfully refreshed from Google Patents.
US3470902A
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US
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Liquid flow control device
Assignee: United States Atomic Energy Commission
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Filing: 1967-03-01
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Granted: 1969-10-07
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Expires: 1987-03-01
Abstract
No abstract record available.
Inventors
- 👤 James R Hackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:23
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/165; F; F04; F04F; F04F5/00; F04F5/44; F04F5/48; G01F1/00; G01F1/05; G01F1/52; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US970411A
Cited
US1645639A
Cited
US2147977A
Cited
US2153450A
Cited
CH225031A
Cited
GB649754A
Cited
US2815765A
Cited
US2889846A
Cited
US3360002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |