US2825854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of demagnetizing
Assignee: LITTWIN FAMILY TRUST NO 1
•
Filing: 1957-04-01
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Granted: 1958-03-04
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur K Littwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2019320A
Cited
US2632035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |