US1687119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-distributing device
Assignee: Individual
•
Filing: 1923-03-13
•
Granted: 1928-10-09
•
Expires: 1943-03-13
Abstract
No abstract record available.
Inventors
- 👤 Benson Elof
- 👤 Frederick M Durkee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:16
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; F; F21; F21S; F21S41/00; F21S41/20; F21S41/28; F21S41/40; F21S41/43; F21V; F21V11/00; G02B6/00; G02B6/04; G02B6/06; F21W; F21W2107/00; F21W2107/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-10-09 | 1932-04-09 | 1932-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-09 | 1936-04-09 | 1936-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-09 | 1940-04-09 | 1940-10-09 | $7700.00 | Window Closed / Lapsed |