Patent US3450206A successfully refreshed from Google Patents.
US3450206A
Expired / Lapsed
US
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Flow control valve
Assignee: Camco Inc
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Filing: 1967-09-28
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Granted: 1969-06-17
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Expires: 1987-09-28
Abstract
No abstract record available.
Inventors
- 👤 Fred E Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:29
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08; E21B33/00; E21B33/02; E21B33/03; E21B33/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2328014A
Cited
US1882314A
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US2122080A
Cited
US3279545A
Cited
US3367362A
Cited
US3385372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |