US2907036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain ventilating tunnel
Assignee: National Steel Corp
•
Filing: 1954-08-05
•
Granted: 1959-09-29
•
Expires: 1974-08-05
Abstract
No abstract record available.
Inventors
- 👤 Collins Tappan
- 👤 Maynard C Seim
- 👤 Vernis A Brayman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:09
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/74; B65D88/742
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319267A
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USRE24026E
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AU1346128A
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US2196391A
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US2572955A
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US2705910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |