US2673976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: American Sign and Indicator Corp
•
Filing: 1952-12-19
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Granted: 1954-03-30
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Expires: 1972-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles M Williams
- 👤 Luke G Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:35
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/307; G04; G04G; G04G9/00; G04G9/08; G04G9/10; G04G9/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |