US2946132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain drier and valve therefor
Assignee: OB Armstrong & Son
•
Filing: 1957-10-14
•
Granted: 1960-07-26
•
Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 George W Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:38
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/001; F26B25/002; F26B17/00; F26B17/12; F26B17/14; F26B17/1408; F26B17/1416
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US199118A
Cited
US278356A
Cited
US1384047A
Cited
US1685338A
Cited
DE608825C
Cited
FR50764E
Cited
US2776786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |