US2602545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data comparing apparatus
Assignee: International Business Machines Corp
•
Filing: 1947-12-30
•
Granted: 1952-07-08
•
Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 Hans P Luhn
- 👤 Biagio F Ambrosio
- 👤 Kenneth W Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2140355A
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US2189024A
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US2162508A
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US2379828A
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US2328671A
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US2400574A
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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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |