Patent US4771014A successfully refreshed from Google Patents.
Patent EP1209886A2 successfully refreshed from Google Patents.
Patent US3143247A successfully refreshed from Google Patents.
Patent US2749095A successfully refreshed from Google Patents.
US2749095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning
Assignee: Servel Inc
•
Filing: 1952-08-25
•
Granted: 1956-06-05
•
Expires: 1972-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Philip P Anderson
- 👤 Edward M Stubblefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:47
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B29/00; F25B29/006; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |