US2501123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic and natural rubber compositions containing wax and heattreated gilsonite
Assignee: AT&T Inc
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Filing: 1946-03-26
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Granted: 1950-03-21
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Expires: 1966-03-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:40
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L21/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L2201/00; C08L2201/08; C08L91/00; C08L91/06; C08L95/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
AN ELECTRICAL INSULATING COMPOUND, WHICH COMPRISES FROM ABOUT 30% TO ABOUT 55% OF A VULCANIZABLE MATERIAL OF THE GROUP CONSISTING OF NATURAL RUBBER, RUBBER-LIKE BUTADIENE COPOLYMERS WITH OTHER MONOMERS COPOLYMERIZABLE THEREWITH MIXTURES OF NATURAL RUBBER AND SUCH RUBBER-LIKE COPOLYMERS, AND RUBBER-LIKE POLYHALOPRENES, AND FROM ABOUT 10% TO ABOUT 30% OF A BITUMINOUS COMPOSITION CONSISTING OF FROM ABOUT 80% TO ABOUT 90% OF A GLSONITE DERIVATE, FROM ABOUT 3% TO ABOUT 15% OF PARAFFIN AND FROM ABOUT 2% TO ABOUT 10% OF MICROCRYSTALLINE WAXES, SAID GILSONITE DERIVATIVE BEING THE PRODUCT OBTAINED BY DISTILLING FROM GILSONITE SUFFICIENT VIOLATILE MATTER TO CAUSE IT TO HAVE A SOFTENING POINT FROM ABOUT 15*F TO ABOUT 20*F. LOWER THAN THAT OF THE ORIGINAL GILSONITE.
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |