US2553302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heating assembly
Assignee: Individual
•
Filing: 1947-10-13
•
Granted: 1951-05-15
•
Expires: 1967-10-13
Abstract
No abstract record available.
Inventors
- 👤 Leo W Cornwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:28
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0046; F24D; F24D11/00; F24D11/002; F24D11/003; F24S; F24S10/00; F24S10/70; F24S10/72; F24S50/00; F24S50/40; F24S80/00; F24S80/50; F24S2080/501; F24S2080/502; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S165/00; Y10S165/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US695136A
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US1242511A
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FR529163A
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US1696003A
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US1810798A
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US1888620A
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US1853480A
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FR801627A
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FR49346E
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US2238362A
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US2342211A
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US2396338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |