Patent US4992153A successfully refreshed from Google Patents.
US2765288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions containing coal tar pitch and an epoxy ether resin
Assignee: Pittsburgh Coke and Chemical Co
•
Filing: 1954-12-28
•
Granted: 1956-10-02
•
Expires: 1974-12-28
Abstract
No abstract record available.
Inventors
- 👤 Whittier Fred
- 👤 Raymond J Lawn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
C; C08; C08L; C08L63/00; C09; C09D; C09D163/00; C09D195/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31717; Y10T428/31815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A COLD SETTING BITUMINOUS COMPOSITION COMPRISING COAL TAR PITCH SUBSTANTIALLY INSOLUBLE IN ALKALI, ETHANOL, AND ISOPROPANOL, EPOXY ETHER RESIN HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1 AND A CURING AGENT FOR SAID EPOXY ETHER RESIN, WHEREIN SAID EPOXY ETHER RESIN IS BETWEEN 15% AND 80% OF THE MIXTURE OF EPOXY EHTER RESIN AND SAID COAT TAR PITCH.
Claim 2
Dependent Claim
57 words
A COLD SETTING BITUMINOUS COMPOSITION COMPRISING COAL TAR PITCH SUBSTANTIALLY INSOLUBLE IN ALKALI, ETHANOL, AND ISOPROPANOL, EPOXY ETHER RESIN HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1 AND A CURING AGENT FOR SAID EPOXY ETHER RESIN, WHEREIN SAID EPOXY ETHER RESIN IS BETWEEN 15% AND 80% OF THE MIXTURE OF EPOXY EHTER RESIN AND SAID COAT TAR PITCH.
References Cited (Backward Citations)
US2528417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |