Patent US2540396A successfully refreshed from Google Patents.
US1776785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting means for advertising signs
Assignee: AMERICAN SAFETY DEVICE Co
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Filing: 1929-06-27
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Granted: 1930-09-30
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Expires: 1949-06-27
Abstract
No abstract record available.
Inventors
- 👤 Frederic A Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
G; G09; G09F; G09F15/00; G09F15/0006
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) | 1933-09-29 | 1934-03-31 | 1934-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-29 | 1938-03-31 | 1938-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-29 | 1942-03-31 | 1942-09-30 | $7700.00 | Window Closed / Lapsed |