US2987961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar furnace
Assignee: Individual
•
Filing: 1958-04-17
•
Granted: 1961-06-13
•
Expires: 1978-04-17
Abstract
No abstract record available.
Inventors
- 👤 Eugene S Cotton
- 👤 John M Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
F; F24; F24S; F24S30/00; F24S30/40; F24S23/00; F24S23/70; F24S25/00; F24S25/60; F24S25/61; F24S25/617; F24S2023/83; F24S2023/832; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US514669A
Cited
US683088A
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US797891A
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US811274A
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US951850A
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US1248456A
Cited
US1367472A
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US1386781A
Cited
US1479923A
Cited
US2471954A
Cited
FR1035832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |