US2292447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrating process
Assignee: D C PFEIFFER
•
Filing: 1941-04-22
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Granted: 1942-08-11
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Expires: 1961-04-22
Abstract
No abstract record available.
Inventors
- 👤 Jr James C Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:30
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/90; A23B2/92; F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-08-10 | 1946-02-09 | 1946-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-10 | 1950-02-09 | 1950-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-10 | 1954-02-09 | 1954-08-11 | $7700.00 | Window Closed / Lapsed |