Patent US4798984A successfully refreshed from Google Patents.
Patent US2506936A successfully refreshed from Google Patents.
US2506936A
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Roof cooling system
Assignee: Individual
•
Filing: 1947-04-29
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Granted: 1950-05-09
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Expires: 1967-04-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred T Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F1/00; F24F1/0007; F24F1/0059; Y; Y02; Y02B; Y02B30/00; Y02B30/54; Y10; Y10S; Y10S239/00; Y10S239/15; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/7036; Y10T137/8593; Y10T137/86389; Y10T137/86445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266321A
Cited
US2437156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |