US2976256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous compositions containing epoxy ether resin and chlorinated rubber
Assignee: Pittsburgh Chemical Co
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Filing: 1957-05-02
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Granted: 1961-03-21
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Expires: 1977-05-02
Abstract
No abstract record available.
Inventors
- 👤 Whittier Fred
- 👤 Raymond J Lawn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
C; C08; C08L; C08L95/00; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A BITUMINOUS COMPOSITION COMPRISING COAL TAR PITCH, AN EPOXY ETHER RESIN HAVING A 1,2-EPOXY EQUIVALENCY OF GREATER THAN ONE, 0.1-5% BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF A MEMBER OF THE GROUP CONSISTING OF CHLORINATED RUBBER AND RUBBER HYDROCHLORIDE AND 1-5% BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF A THIXOTROPIC AGENT SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL SILICA, QUATERNARY AMMONIUM CLAYS AND ALCOHOL ESTERIFIED AMORPHOUS SILICA, WHEREIN SAID EPOXY ETHER RESIN IS BETWEEN 10 AND 90% OF THE MIXTURE OF EPOXY ETHER RESIN AND SAID COAL TAR PITCH.
Claim 2
Dependent Claim
93 words
A BITUMINOUS COMPOSITION COMPRISING COAL TAR PITCH, AN EPOXY ETHER RESIN HAVING A 1,2-EPOXY EQUIVALENCY OF GREATER THAN ONE, 0.1-5% BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF A MEMBER OF THE GROUP CONSISTING OF CHLORINATED RUBBER AND RUBBER HYDROCHLORIDE AND 1-5% BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF A THIXOTROPIC AGENT SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL SILICA, QUATERNARY AMMONIUM CLAYS AND ALCOHOL ESTERIFIED AMORPHOUS SILICA, WHEREIN SAID EPOXY ETHER RESIN IS BETWEEN 10 AND 90% OF THE MIXTURE OF EPOXY ETHER RESIN AND SAID COAL TAR PITCH.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |