Patent US2569540A successfully refreshed from Google Patents.
US2569540A
Expired / Lapsed
US
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Self-sealing insulating material of high dielectric strength
Assignee: Bishop Manufacturing Corp
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Filing: 1949-01-04
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Granted: 1951-10-02
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Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 Harold E Selby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:29
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; B; B29; B29C; B29C61/00; B29C61/003; B32; B32B; B32B27/00; C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; B29K; B29K2023/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN INSULATING COMPOSITION OF HIGH DIELECTRIC STRENGTH WHICH UPON BEING STRETCHED AND DISPOSED IN OVERLAPPING LAMINATIONS FLOWS TOGETHER INTO A HOMOGENEOUS BODY, CONSISTING ESSENTIALLY OF A NORMALLY SEMI-RIGID POLYETHYLENE HAVING ELECTRICAL INSULATING PROPERTIES, THE AMOUNT OF POLYETHYLENE BEING UP TO 50%, BETWEEN ABOUT 5% AND 2/% OF A SULFUR-VULCANIZABLE RUBBERY COPOLYMER OF ISOBUTYLENE AND A DIOLEFIN IN APPROXIMATELY THE PROPORTIONS OF 98D2, BETWEEN ABOUT 9% AND 65% OF AT LEAST ONE POLYISOBUTYLENE HAVING AN AVERAGE UNIT MOLECULAR WEIGHT BETWEEN ABOUT 60,000 AND 75,000 AND BETWEEN ABOUT 1% AND 20% OF A RESINOUS TACKIFIER FOR IMPARTING FLOW AND COHESIVENESS TO SAID COMPOSITION OT CAUSE SAID LAMINATIONS TO FLOW TOGETHER.
Claim 2
Dependent Claim
108 words
AN INSULATING COMPOSITION OF HIGH DIELECTRIC STRENGTH WHICH UPON BEING STRETCHED AND DISPOSED IN OVERLAPPING LAMINATIONS FLOWS TOGETHER INTO A HOMOGENEOUS BODY, CONSISTING ESSENTIALLY OF A NORMALLY SEMI-RIGID POLYETHYLENE HAVING ELECTRICAL INSULATING PROPERTIES, THE AMOUNT OF POLYETHYLENE BEING UP TO 50%, BETWEEN ABOUT 5% AND 2/% OF A SULFUR-VULCANIZABLE RUBBERY COPOLYMER OF ISOBUTYLENE AND A DIOLEFIN IN APPROXIMATELY THE PROPORTIONS OF 98D2, BETWEEN ABOUT 9% AND 65% OF AT LEAST ONE POLYISOBUTYLENE HAVING AN AVERAGE UNIT MOLECULAR WEIGHT BETWEEN ABOUT 60,000 AND 75,000 AND BETWEEN ABOUT 1% AND 20% OF A RESINOUS TACKIFIER FOR IMPARTING FLOW AND COHESIVENESS TO SAID COMPOSITION OT CAUSE SAID LAMINATIONS TO FLOW TOGETHER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |