US2767391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signalling devices
Assignee: Individual
•
Filing: 1952-09-12
•
Granted: 1956-10-16
•
Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Paul H Macmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
B; B62; B62J; B62J6/00; B62J6/06; B62J6/10; B62J6/02; B62J6/028; B62J6/029; B62J6/04; B62J6/22; B62J6/26; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2164; Y10T74/2168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2576934A
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US2505154A
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US2561131A
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US2603701A
Cited
US2661406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |