US3434390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control apparatus
Assignee: Ambac International Corp
•
Filing: 1966-04-25
•
Granted: 1969-03-25
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Paul C Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86614
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA670685A
Cited
US2655940A
Cited
US2624585A
Cited
US2704649A
Cited
US2912008A
Cited
US2931389A
Cited
US2983278A
Cited
US2967545A
Cited
US2977985A
Cited
US3318332A
Cited
GB957900A
Cited
US3269417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |