Patent US3446741A successfully refreshed from Google Patents.
US3446741A
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US
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Insulating device,composition,and method
Assignee: 3M Co
•
Filing: 1963-11-14
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Granted: 1969-05-27
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harold C Hervig
- 👤 Edward E Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:35
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/003; H01; H01B; H01B3/00; H01B3/002; H01B3/18; H01B3/30; H01B3/307; H01B3/40; H02G15/02; H02G15/06; H02G15/064; H02G15/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2967901A
Cited
US3087606A
Cited
US2868730A
Cited
US2788327A
Cited
US3079289A
Cited
US2806509A
Cited
US3018318A
Cited
US3016308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |