Patent US3669888A successfully refreshed from Google Patents.
US3669888A
Expired / Lapsed
US
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Electrical insulating materials based on olefin polymers
Assignee: BASF SE
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Filing: 1969-06-11
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Granted: 1972-06-13
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Expires: 1989-06-11
Abstract
Abstract Electrical insulating materials based on olefin polymers and containing agents for increasing their electric strength. The electrical insulating materials according to the invention contain anilines bearing special substituents as the agents for increasing electric strength.
Inventors
- 👤 Franz Wuerstlin
- 👤 Franz Feichtmayr
- 👤 Heinz Eilingsfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:46
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
An electrical insulating composition as claimed in claim 1 wherein the said percentage is from 1 to 3 percent by weight.
Claim 2
Dependent Claim
22 words
A composition as claimed in claim 1 wherein the olefin polymer is a polyethylene having a density of from 0.918 to 0.960.
References Cited (Backward Citations)
US2827450A
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GB909843A
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US3139451A
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US3079366A
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US3318842A
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GB1114603A
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US3522183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |