US2018347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric rare gas filled lamp
Assignee: Individual
•
Filing: 1930-12-22
•
Granted: 1935-10-22
•
Expires: 1950-12-22
Abstract
No abstract record available.
Inventors
- 👤 Beaufort Jean Marie Edouard De
- 👤 Danzer Catherine
- 👤 Randa General Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/70; H01J61/72; C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; F; F16; F16B; F16B21/00; F16B21/10; F16B21/16
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) | 1938-10-21 | 1939-04-22 | 1939-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-10-21 | 1943-04-22 | 1943-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-10-21 | 1947-04-22 | 1947-10-22 | $7700.00 | Window Closed / Lapsed |