US2917795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar operated louver apparatus
Assignee: Individual
•
Filing: 1957-12-16
•
Granted: 1959-12-22
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Lemual G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/71; Y; Y10; Y10S; Y10S454/00; Y10S454/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2198488A
Cited
US2083726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |