US3533806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain preservative method
Assignee: WILLIAM C BROTHERS
•
Filing: 1967-09-26
•
Granted: 1970-10-13
•
Expires: 1987-09-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Papworth
- 👤 William C Brothers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:15
CPC Classifications
A; A23; A23B; A23B9/00; A23B9/16; A23B9/24; A23B9/26; A23B9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1311709A
Cited
US1928903A
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US2004001A
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US2032264A
Cited
GB455846A
Cited
US2417889A
Cited
US3341280A
Cited
US3346398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |