US2991042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe through-conduit gate valve
Assignee: ACF Industries Inc
•
Filing: 1957-07-19
•
Granted: 1961-07-04
•
Expires: 1977-07-19
Abstract
No abstract record available.
Inventors
- 👤 Paul J Natho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:01
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0254; F16K31/00; F16K31/12; F16K31/14; F16K31/143
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA532732A
Cited
US1195658A
Cited
US563011A
Cited
US630067A
Cited
US798551A
Cited
US966672A
Cited
US1039340A
Cited
US1819043A
Cited
US1926529A
Cited
US1861916A
Cited
US2161175A
Cited
US2541968A
Cited
US2698157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |