US3431940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shut-off for pressure controlled liquid flow system at zero flow
Assignee: Clow Corp
•
Filing: 1966-07-13
•
Granted: 1969-03-11
•
Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 William M Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:03
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/208; E; E03; E03B; E03B5/00; E03B5/02; F; F04; F04D; F04D15/00; F04D15/0072; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86163
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1560044A
Cited
US2582259A
Cited
US2628995A
Cited
US2707440A
Cited
US2888875A
Cited
US2981195A
Cited
US3135282A
Cited
US3229639A
Cited
US3195555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |