US2878831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control means
Assignee: Individual
•
Filing: 1957-02-04
•
Granted: 1959-03-24
•
Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Farnham Rex Couvelas
- 👤 Webb Edward Francis Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0173; F; F16; F16K; F16K13/00; F22; F22D; F22D11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/87467; Y10T137/87475
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |