Patent US2797169A successfully refreshed from Google Patents.
US2797169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-dusting asphaltic coatings
Assignee: California Research LLC
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Filing: 1953-05-11
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Granted: 1957-06-25
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Edward W Mertens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:40
CPC Classifications
C; C09; C09D; C09D195/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN ASPHALTIC COMPOSITION SUITABLE FOR PRODUCING THIN PROTECTIVE COATINGS OF IMPROVED RESISTANCE TO DUSTING, WHICH COMPRISES AN ASPHALT AND A SMALL AMOUNT, FROM ABOUT 0.025% TO ABOUT 5% OF SAID ASPHALT, OF A DUST INHIBITING DIPHENYLAMINE HAVING A POLAR SUBSTITUENT ON AT PARA-PHENYLENE DIAMINE, AND PARA-ISOPROPOXY DIPHENYLGROUP CONSISTING OF THIO-DIPHENYLAMINE, N,N''-DIPHENYLLEAST ONE OF SAID PHENYL RINGS AND IS SELECTED FROM THE AMINE.
Claim 2
Dependent Claim
62 words
AN ASPHALTIC COMPOSITION SUITABLE FOR PRODUCING THIN PROTECTIVE COATINGS OF IMPROVED RESISTANCE TO DUSTING, WHICH COMPRISES AN ASPHALT AND A SMALL AMOUNT, FROM ABOUT 0.025% TO ABOUT 5% OF SAID ASPHALT, OF A DUST INHIBITING DIPHENYLAMINE HAVING A POLAR SUBSTITUENT ON AT PARA-PHENYLENE DIAMINE, AND PARA-ISOPROPOXY DIPHENYLGROUP CONSISTING OF THIO-DIPHENYLAMINE, N,N''-DIPHENYLLEAST ONE OF SAID PHENYL RINGS AND IS SELECTED FROM THE AMINE.
References Cited (Backward Citations)
US2340640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |