Patent US2429069A successfully refreshed from Google Patents.
US2364889A
Expired / Lapsed
US
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Luminous discharge lamp especially for photographic enlargers and projectors
Assignee: Individual
•
Filing: 1940-12-10
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Granted: 1944-12-12
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Expires: 1960-12-10
Abstract
No abstract record available.
Inventors
- 👤 Lyman C Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/82; H01J61/02; H01J61/30
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) | 1947-12-12 | 1948-06-12 | 1948-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-12 | 1952-06-12 | 1952-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-12 | 1956-06-12 | 1956-12-12 | $7700.00 | Window Closed / Lapsed |