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Patent US3069207A successfully refreshed from Google Patents.
US3069207A
Expired / Lapsed
US
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Apparatus for unloading bulk materials from hopper cars
Assignee: Individual
•
Filing: 1960-01-12
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Granted: 1962-12-18
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Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jack W Borger
- 👤 Linden Frank A Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:57
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/002; B61D5/004; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US835409A
Cited
US2030553A
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US2368396A
Cited
US2650726A
Cited
US2919158A
Cited
US2858165A
Cited
US2926963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |