Patent US2767555A successfully refreshed from Google Patents.
US2767555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frost bank automatic defrost actuator
Assignee: Whirlpool Corp
•
Filing: 1953-07-16
•
Granted: 1956-10-23
•
Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Rountree Wickliffe Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:14
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25D2700/00; F25D2700/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2007409A
Cited
US2064010A
Cited
US2147867A
Cited
US2375859A
Cited
US2624180A
Cited
US2704441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |