US2438098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric control mechanism for flame-cutting devices
Assignee: Reconstruction Finance Corp
•
Filing: 1942-10-09
•
Granted: 1948-03-16
•
Expires: 1962-10-09
Abstract
No abstract record available.
Inventors
- 👤 William S Tandler
- 👤 David S Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:50
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/002; B23K7/004; G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/124; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 0
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GB513848A
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US2286571A
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US2261644A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |