Patent US3532800A successfully refreshed from Google Patents.
US3532800A
Expired / Lapsed
US
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Extra high voltage oil-impregnated synthetic paper insulation and cable
Assignee: 3M Co
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Filing: 1969-03-10
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Granted: 1970-10-06
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Expires: 1989-03-10
Abstract
No abstract record available.
Inventors
- 👤 Grayson F Wyly
- 👤 Charles A Buehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:13
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; H01B13/00; H01B13/30; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/44; H01B3/441; H01B3/48; H01B3/485; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3077514A
Cited
US2905585A
Cited
US3049466A
Cited
US3077510A
Cited
US3229024A
Cited
US3376378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |