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US3484744A
Expired / Lapsed
US
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Apparatus for verifying or producing check digit numbers
Assignee: Ultronic Systems Corp
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Filing: 1967-02-14
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Granted: 1969-12-16
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 Eugene I Gertler
- 👤 Stanley J Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:10
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1012; G06F11/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2634052A
Cited
US2888199A
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US2886240A
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US2911149A
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US3040985A
Cited
US2974865A
Cited
US3138701A
Cited
US3163748A
Cited
US3384902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |