Patent US3455253A successfully refreshed from Google Patents.
US3455253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple hopper door actuating mechanism
Assignee: Midland Ross Corp
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Filing: 1967-01-12
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Granted: 1969-07-15
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Expires: 1987-01-12
Abstract
No abstract record available.
Inventors
- 👤 Walter L Floehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US693132A
Cited
US734977A
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US776149A
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US1067863A
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US1184036A
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US1209809A
Cited
US1908096A
Cited
US3137247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |