US2501495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying process
Assignee: International Business Machines Corp
•
Filing: 1946-05-04
•
Granted: 1950-03-21
•
Expires: 1966-05-04
Abstract
No abstract record available.
Inventors
- 👤 Fred M Carroll
- 👤 George E Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:24
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US354794A
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US848556A
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GB191500044A
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US1645930A
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US1636405A
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US1580010A
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US1917370A
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US2188590A
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US2299014A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |