Patent US2730173A successfully refreshed from Google Patents.
US2730173A
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US
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Punching apparatus
Assignee: AT&T Inc
•
Filing: 1952-01-05
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Granted: 1956-01-10
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Expires: 1972-01-05
Abstract
No abstract record available.
Inventors
- 👤 Rudolph S Brescka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/26; B21D28/265; Y; Y10; Y10T; Y10T408/00; Y10T408/08; Y10T408/16; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238; Y10T83/00; Y10T83/626; Y10T83/647; Y10T83/654; Y10T83/6563; Y10T83/6564; Y10T83/828; Y10T83/869; Y10T83/875
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |