US2561387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punching and reinforcing device for sheet material
Assignee: Individual
•
Filing: 1948-01-14
•
Granted: 1951-07-24
•
Expires: 1968-01-14
Abstract
No abstract record available.
Inventors
- 👤 Forese Carman Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/27; B26D7/34; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1062; Y10T156/1075; Y10T156/12; Y10T156/1304; Y10T156/1309; Y10T156/1378; Y10T156/1383
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US851794A
Cited
US1068950A
Cited
US2228372A
Cited
US2353232A
Cited
US2362755A
Cited
US2441821A
Cited
US2409872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |