US2080120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for cooling a light projector and the beam produced thereby
Assignee: Individual
•
Filing: 1934-12-28
•
Granted: 1937-05-11
•
Expires: 1954-12-28
Abstract
No abstract record available.
Inventors
- 👤 David W Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:04
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/04; F21V17/00; F21V17/10; F21V17/107; F21V29/00; F21V29/50; F21V29/70; F21V29/83; G; G03; G03B; G03B15/00; G03B15/02; F21S; F21S8/00; F21S8/003; F21W; F21W2131/00; F21W2131/40; F21W2131/402; F21W2131/406
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) | 1940-05-10 | 1940-11-09 | 1941-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-05-10 | 1944-11-09 | 1945-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-05-10 | 1948-11-09 | 1949-05-11 | $7700.00 | Window Closed / Lapsed |