US2448830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record sensing and comparing means
Assignee: International Business Machines Corp
•
Filing: 1947-04-15
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Granted: 1948-09-07
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Expires: 1967-04-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Robbins
- 👤 Robert T Blakely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
B; B07; B07C; B07C3/00; B07C3/10; B07C3/14; G; G06; G06K; G06K7/00; G06K7/01; G06K7/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |