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US2994429A
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Assignee: International Business Machines Corp
•
Filing: 1955-08-30
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Granted: 1961-08-01
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Hans P Luhn
- 👤 Edward S Wilson
- 👤 William L Stahl
- 👤 Donald P Berg
- 👤 William S Dustman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:09
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/16; B07C5/18; B07C5/20; G; G06; G06K; G06K17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732896A
Cited
US1656999A
Cited
GB430393A
Cited
US2286812A
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US2369794A
Cited
US2602544A
Cited
US2448830A
Cited
US2539998A
Cited
US2693277A
Cited
US2738874A
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US2749533A
Cited
US2730233A
Cited
US2749484A
Cited
US2804974A
Cited
US2795328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |