US3256836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper doors operating assembly
Assignee: UNITCAST CORP
•
Filing: 1963-01-07
•
Granted: 1966-06-21
•
Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Walter L Floehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
OPERATING MECHANISM FOR A HINGED HOPPER DOOR COMPRISING MEANS RECIPROCABLE NORMAL TO A HINGING AXIS OF SAID DOOR, MEANS FIXED TO SAID DOOR, AND MEANS ON SAID RECIPROCABLE MEANS AND NORMALLY DISENGAGED FROM SAID FIXED MEANS ONLY ON SAID DOOR AND ENGAGEABLE
Claim 2
Dependent Claim
42 words
OPERATING MECHANISM FOR A HINGED HOPPER DOOR COMPRISING MEANS RECIPROCABLE NORMAL TO A HINGING AXIS OF SAID DOOR, MEANS FIXED TO SAID DOOR, AND MEANS ON SAID RECIPROCABLE MEANS AND NORMALLY DISENGAGED FROM SAID FIXED MEANS ONLY ON SAID DOOR AND ENGAGEABLE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |