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US3175481A
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Assignee: International Business Machines Corp
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Filing: 1960-05-02
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Granted: 1965-03-30
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Roy J Lahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:14
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/528
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125013A
Cited
GB285738A
Cited
US2198115A
Cited
US2410104A
Cited
US2419836A
Cited
US2852651A
Cited
US3060805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |