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US2442365A
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US
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Chronograph screen changer
Assignee: Individual
•
Filing: 1942-12-07
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Granted: 1948-06-01
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Expires: 1962-12-07
Abstract
No abstract record available.
Inventors
- 👤 Leming Dell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
F; F41; F41J; F41J1/00; F41J1/10; F41J7/00; Y; Y10; Y10S; Y10S353/00; Y10S353/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US495371A
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US1002078A
Cited
US1357281A
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US1821341A
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US2152026A
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US2213779A
Cited
US2188339A
Cited
US2260660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |