Patent US2554461A successfully refreshed from Google Patents.
US2554461A
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US
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Electrical insulating materials
Assignee: Anglo Iranian Oil Co Ltd
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Filing: 1948-02-11
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Granted: 1951-05-22
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Expires: 1968-02-11
Abstract
No abstract record available.
Inventors
- 👤 Howes Donald Albert
- 👤 Pethrick Samuel Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:31
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
60 words
A COMPOSITION OF MATTER HAVING MECHANICAL AND ELECTRICAL PROPERTIES SUCH THAT IT IS SUITABLE FOR USE AS AN ELECTRICAL INSULATING MATERIAL IN SUBSTITUTION FOR CERAMIC MATERIALS, BEING A UNIFORM MOULDABLE MIXTURE COMPRISING AN AMOUNT NOT EXCEEDING 35% BY WEIGHT OF AT LEAST ONE BINDER SELECTED FROM THE GROUP CONSISTING OF BITUMEN, PARRAFIN WAX AND SHALE RESIN, AND AMAGNESIAZINC OXIDE MIXTURE.
Claim 2
Dependent Claim
60 words
A COMPOSITION OF MATTER HAVING MECHANICAL AND ELECTRICAL PROPERTIES SUCH THAT IT IS SUITABLE FOR USE AS AN ELECTRICAL INSULATING MATERIAL IN SUBSTITUTION FOR CERAMIC MATERIALS, BEING A UNIFORM MOULDABLE MIXTURE COMPRISING AN AMOUNT NOT EXCEEDING 35% BY WEIGHT OF AT LEAST ONE BINDER SELECTED FROM THE GROUP CONSISTING OF BITUMEN, PARRAFIN WAX AND SHALE RESIN, AND AMAGNESIAZINC OXIDE MIXTURE.
Claim 3
Dependent Claim
41 words
A COMPOSITION OF MATTER IN ACCORDANCE WITH CLAIM 1 WHICH INCLUDES AN AMOUNT NOT EXCEEDING 10% BY WEIGHT OF ALUMINUM STEARATE AND AN AMOUNT NOT EXCEEDING 10% BY WEIGHT OF A MODIFIER-SELECTED FROM THE GROUP CONSISTING OF A MODIPOLYETHYLENE AND POLYISOBUTYLENE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |