Patent US1809678A successfully refreshed from Google Patents.
US1809678A
Expired / Lapsed
US
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Glare eliminating device
Assignee: Individual
•
Filing: 1930-05-09
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Granted: 1931-06-09
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Expires: 1950-05-09
Abstract
No abstract record available.
Inventors
- 👤 Vorss Elvin C De
- 👤 William F Lumsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:37
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/04; F21S; F21S41/00; F21S41/20; F21S41/29; F21V11/00; F21S41/30; F21S41/39
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) | 1934-06-08 | 1934-12-08 | 1935-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-08 | 1938-12-08 | 1939-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-08 | 1942-12-08 | 1943-06-09 | $7700.00 | Window Closed / Lapsed |