US2521118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card punching machine
Assignee: AB Dick Co
•
Filing: 1946-02-16
•
Granted: 1950-09-05
•
Expires: 1966-02-16
Abstract
No abstract record available.
Inventors
- 👤 Walter T Gollwitzer
- 👤 John H Gruver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
D; D03; D03C; D03C17/00; B; B26; B26D; B26D7/00; B26D7/26; B26D7/2628; B26F; B26F1/00; B26F1/02; B26F1/04; B26F1/32; B26F1/36; B26F1/38; B26F1/40; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4475; Y10T83/4478; Y10T83/869; Y10T83/8737; Y10T83/874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2194305A
Cited
US1780621A
Cited
US2010642A
Cited
US2091435A
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US2278118A
Cited
US2210552A
Cited
US2189027A
Cited
US2265222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |