US3153494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual hopper valve
Assignee: Individual
•
Filing: 1961-11-08
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Granted: 1964-10-20
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Expires: 1981-11-08
Abstract
No abstract record available.
Inventors
- 👤 Paul E Heider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/54; B65D90/58; B65D90/582; B65D2590/00; B65D2590/54; B65D2590/547
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A DUAL CONTROL VALVE FOR USE WITH HOPPERS HAVING PORTIONS THAT APPROACH EACH OTHER, A SHIELD MOUNTED BETWEEN SAID HOPPERS WHERE THEY APPROACH EACH OTHER, TWO VALVE GATES MOVABLY MOUNTED BELOW SAID SHIELD, MEANS SECURED TO SAID GATES FOR MOVING THEM UNDER SAID SHIELD AND EXTENDING THEM THEREFROM SELECTIVELY, SAID GATES PARTIALLY OVERLAPPING EACH OTHER WHEN BOTH ARE IN A POSITION BELOW SAID SHIELD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |