US2693683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrosting machine
Assignee: EDWARD A DANFORTH
•
Filing: 1951-05-03
•
Granted: 1954-11-09
•
Expires: 1971-05-03
Abstract
No abstract record available.
Inventors
- 👤 Toothman Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25B43/00; F25B2400/00; F25B2400/23
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1970340A
Cited
US2440146A
Cited
US2430960A
Cited
US2526379A
Cited
US2632303A
Cited
US2611587A
Cited
US2641908A
Cited
US2564310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |