Patent US2521370A successfully refreshed from Google Patents.
US2521370A
Expired / Lapsed
US
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Tabulating card fabricating mechanism
Assignee: International Business Machines Corp
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Filing: 1947-01-23
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Granted: 1950-09-05
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Expires: 1967-01-23
Abstract
No abstract record available.
Inventors
- 👤 Richard H Holmwood
- 👤 Kenneth E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:25
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/10; G; G06; G06K; G06K19/00; G06K19/02; G06K19/022; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/1828; Y10T83/00; Y10T83/869; Y10T83/8776; Y10T83/8779
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |