Patent US2471954A successfully refreshed from Google Patents.
US2471954A
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Reflecting and focusing apparatus with pivotally adjustable spaced apart reflecting members for heat and light rays
Assignee: Individual
•
Filing: 1946-05-27
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Granted: 1949-05-31
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Expires: 1966-05-27
Abstract
No abstract record available.
Inventors
- 👤 Harvey Walter James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:34
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; F; F24; F24S; F24S23/00; F24S23/70; F24S23/77; F24S30/00; F24S30/40; F24S2023/87; F24S2030/10; F24S2030/13; F24S2030/131; F24S2030/135; F24S2030/136; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/47
Claims Analysis
Total Claims: 0
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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) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |