US2743668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Postage printing die protection means
Assignee: —
•
Filing: —
•
Granted: 1956-05-01
•
Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
G; G07; G07B; G07B17/00; G07B17/00185; G07B17/00193; B; B41; B41F; B41F33/00; G07B17/00459; G07B17/00508; G07B17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1715451A
Cited
US1874073A
Cited
US1904638A
Cited
US2152204A
Cited
US2179232A
Cited
US2568624A
Cited
US1965724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |