Patent US3053450A successfully refreshed from Google Patents.
US3053450A
Expired / Lapsed
US
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Photoelectric digital adder circuit
Assignee: International Business Machines Corp
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Filing: 1958-12-02
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Granted: 1962-09-11
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Expires: 1978-12-02
Abstract
No abstract record available.
Inventors
- 👤 Frank A Litz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:27
CPC Classifications
G; G06; G06E; G06E1/00; G06E1/02; G06E1/04
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) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |