US2456530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector lamp housing and cooling system therefor
Assignee: Individual
•
Filing: 1944-05-22
•
Granted: 1948-12-14
•
Expires: 1964-05-22
Abstract
No abstract record available.
Inventors
- 👤 Otto R Nemeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:07
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160764A
Cited
US1925149A
Cited
US1966531A
Cited
US2135996A
Cited
US2160890A
Cited
US2269794A
Cited
US2281988A
Cited
US2344263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |