US2557022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing record cards with conductive marks
Assignee: Individual
•
Filing: 1949-10-31
•
Granted: 1951-06-12
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 William H Wolowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:18
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; G06K1/128; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24364
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US128148A
Cited
US2158749A
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US2294681A
Cited
US2493848A
Cited
US2484642A
Cited
US2508953A
Cited
US2547838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |