Patent US2937506A successfully refreshed from Google Patents.
US2937506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system
Assignee: Eastern Ind Inc
•
Filing: 1956-02-07
•
Granted: 1960-05-24
•
Expires: 1976-02-07
Abstract
No abstract record available.
Inventors
- 👤 Eugene D Stirlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:02
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; F; F25; F25B; F25B25/00; F25B25/005; Y; Y02; Y02T; Y02T50/00; Y02T50/40
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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |