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Patent US2633890A successfully refreshed from Google Patents.
US2633890A
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Punching apparatus
Assignee: AT&T Inc
•
Filing: 1949-11-03
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Granted: 1953-04-07
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Expires: 1969-11-03
Abstract
No abstract record available.
Inventors
- 👤 Rozanek Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:19
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/30; B21D43/00; B21D43/02; B21D43/18; Y; Y10; Y10T; Y10T83/00; Y10T83/384; Y10T83/395; Y10T83/398; Y10T83/748
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632237A
Cited
US785202A
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US1036359A
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US2160327A
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US2264520A
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US2204273A
Cited
US2552109A
Cited
US2436806A
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US2447499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |