Patent US3251808A successfully refreshed from Google Patents.
US3251808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of gasoline-soluble and high-melting resins and resulting products
Assignee: Hoechst AG
•
Filing: 1962-06-04
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Granted: 1966-05-17
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Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Kaupp Josef
- 👤 Hambsch Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:41
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/121
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
GASOLINE-SOLUBLE RESINS HAVING A MELTING RANGE FROM ABOVE 80*C. TO 135*C. AND BEING PRODUCED BY REACTING IN AN INERT SOLVENT CONTAINING A FRIEDEL-CRAFTS CATALYST AT A TEMPERATURE ABOVE 60*C. (1) A TERPENE-PHENOL IN LIQUID FORM, OBTAINED BY ADDITIVELY COMBINING MOLAR AMOUNTS OF A TERPENE-HYDROCARBON OF 10 CARBON ATOMS AND PHENOL WITH (2) A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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US2154192A
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DE971720C
Cited
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US3026297A
Cited
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Cited
US3062896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |