Patent US2526777A successfully refreshed from Google Patents.
US1980534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas arc lamp
Assignee: KIRSTEN LIGHTING Corp
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Filing: 1932-03-04
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Granted: 1934-11-13
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Expires: 1952-03-04
Abstract
No abstract record available.
Inventors
- 👤 Kurt F J Kirsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/54; H01J61/545; Y; Y10; Y10S; Y10S315/00; Y10S315/01; Y10S315/02
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) | 1937-11-12 | 1938-05-14 | 1938-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-12 | 1942-05-14 | 1942-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-12 | 1946-05-14 | 1946-11-13 | $7700.00 | Window Closed / Lapsed |