US3048946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door structure for auger feed silos
Assignee: Individual
•
Filing: 1959-04-24
•
Granted: 1962-08-14
•
Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Hawk
- 👤 Edward L Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:08
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/54; A; A01; A01F; A01F25/00; A01F25/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US921586A
Cited
US1515637A
Cited
US1911076A
Cited
US2025220A
Cited
GB573194A
Cited
US2601049A
Cited
US2799407A
Cited
US2906380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |