US2949017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time temperature defrost control
Assignee: Tyler Refrigeration Corp
•
Filing: 1957-06-07
•
Granted: 1960-08-16
•
Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Sven V Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:02
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25D21/008; G; G04; G04C; G04C23/00; G04C23/14; G04C23/16; G04C23/34; G04C23/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |