Patent US2228372A successfully refreshed from Google Patents.
US2228372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper perforator with automatic reinforcing device of the paper at the holes
Assignee: Individual
•
Filing: 1936-05-20
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Granted: 1941-01-14
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Expires: 1956-05-20
Abstract
No abstract record available.
Inventors
- 👤 Skrebba Ida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:15
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/27; B26D7/34; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/107; Y10T156/12; Y10T156/1304; Y10T156/1378; Y10T83/00; Y10T83/343
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) | 1944-01-14 | 1944-07-15 | 1945-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-14 | 1948-07-15 | 1949-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-14 | 1952-07-15 | 1953-01-14 | $7700.00 | Window Closed / Lapsed |