US2985300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing of magnetic materials
Assignee: International Business Machines Corp
•
Filing: 1956-04-04
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Granted: 1961-05-23
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Gilbert O Boehm
- 👤 Jr Benjamin H Matteson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:44
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/344; G; G01; G01R; G01R33/00; G01R33/12; G01R33/1207; Y; Y10; Y10S; Y10S209/00; Y10S209/907; Y10S209/92; Y10S209/934
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |