Patent US2525560A successfully refreshed from Google Patents.
US2525560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature defrosting system
Assignee: ED FRIEDRICH Inc
•
Filing: 1949-02-04
•
Granted: 1950-10-10
•
Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Richard E Pabst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0439; A47F3/0443; F; F25; F25B; F25B41/00; F25B41/20; F25B41/26; F25B47/00; F25B47/02; F25B47/022; F25B47/025; F25B2400/00; F25B2400/05; F25B2400/052; F25B2400/054; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4252; Y10T137/6416; Y10T137/6525; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/7032; Y10T137/7036; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/87265; Y10T137/87507
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2124268A
Cited
US2178445A
Cited
US2299404A
Cited
US2281770A
Cited
US2351140A
Cited
US2459173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |