US3539438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulative polymer impregnated,mica-paper tape
Assignee: 3M Co
•
Filing: 1967-06-12
•
Granted: 1970-11-10
•
Expires: 1987-06-12
Abstract
No abstract record available.
Inventors
- 👤 Gaylord L Groff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/447; H01B3/02; H01B3/04; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2763315A
Cited
US2562004A
Cited
US2739638A
Cited
US2925174A
Cited
US2954358A
Cited
US3301801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |