Patent US2234274A successfully refreshed from Google Patents.
US2234274A
Expired / Lapsed
US
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Electrode feeding mechanism for arc lamps
Assignee: Carl Zeiss SMT GmbH
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Filing: 1939-04-26
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Granted: 1941-03-11
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Expires: 1959-04-26
Abstract
No abstract record available.
Inventors
- 👤 Prinz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:09
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/025; H; H05; H05B; H05B31/00; H05B31/0081; H05B31/009; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
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) | 1944-03-10 | 1944-09-09 | 1945-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-10 | 1948-09-09 | 1949-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-10 | 1952-09-09 | 1953-03-11 | $7700.00 | Window Closed / Lapsed |