US2631440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for freezing packaged products
Assignee: Individual
•
Filing: 1948-12-18
•
Granted: 1953-03-17
•
Expires: 1968-12-18
Abstract
No abstract record available.
Inventors
- 👤 Isaac H Polk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/80; A23B2/803; A23B2/8033; F; F25; F25D; F25D31/00; F25D31/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1887127A
Cited
US1993431A
Cited
US2242527A
Cited
US2329746A
Cited
US2307548A
Cited
US2455867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |