Patent US3855111A successfully refreshed from Google Patents.
Patent US3297673A successfully refreshed from Google Patents.
US3297673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of terpene resins
Assignee: Tenneco Chemicals Inc
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Filing: 1963-10-03
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Granted: 1967-01-10
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Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry G Sellers
- 👤 Henry E Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:36
CPC Classifications
C; C08; C08F; C08F32/00; C08F32/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
THE PROCESS OF PRODUCING POLYTERPENE RESINS COMPRISING THE STEPS OF POLYMERIZING A TERPENE IN A SOLVENT MEDIUM IN THE PRESENCE OF METAL HALIDE POLYMERIZATION CATALYST, SAID SOLVENT MEDIUM COMPRISING A RELATIVELY LOWER BOILING AROMATIC HYDROCARBON SOLVENT AND A RELATIVELY HIGHER BOILING ALIPHATIC HYDROCARBON SOLVENT REMOVING SUBSTANTIALLY ALL OF THE AROMATIC HYDROCARBON SOLVENT FROM THE POLYMER SOLUTION BY DISTILLATION, AND THEREAFTER RECOVERING THE TERPENE POLYMER.
Claim 2
Dependent Claim
64 words
THE PROCESS OF PRODUCING POLYTERPENE RESINS COMPRISING THE STEPS OF POLYMERIZING A TERPENE IN A SOLVENT MEDIUM IN THE PRESENCE OF METAL HALIDE POLYMERIZATION CATALYST, SAID SOLVENT MEDIUM COMPRISING A RELATIVELY LOWER BOILING AROMATIC HYDROCARBON SOLVENT AND A RELATIVELY HIGHER BOILING ALIPHATIC HYDROCARBON SOLVENT REMOVING SUBSTANTIALLY ALL OF THE AROMATIC HYDROCARBON SOLVENT FROM THE POLYMER SOLUTION BY DISTILLATION, AND THEREAFTER RECOVERING THE TERPENE POLYMER.
Claim 3
Dependent Claim
116 words
THE PROCESS OF PRODUCING DIPENTENE POLYMER RESINS COMPRISING GRADUALLY ADDING DIPENTENE TO A SOLVENT MEDIUM CONTAINING ALUMINUM CHLORIDE CATALYST WHILE MAINTAINING THE TEMPERATURE IN THE RANGE OF 30*-55*C., THEREBY POLYMERIZING THE DIPENTENE, SAID SOLVENT MEDIUM CONSTITUTING FROM 60% TO 100% BY WEIGHT OF THE DIPENTENE AND INCLUDING TOLUENE IN AN AMOUNT IN THE RANGE 25% TO 50% BY WEIGHT OF THE DIPENTENE WITH THE REMAINDER OF THE SOLVENT MEDIUM BEING PETROLEUM NAPHTHA, HEATING THE RESULTING POLYMER SOLUTION TO A TEMPERATURE IN THE RANGE OF 110*-200*C. IN THE PRESENCE OF LIME AND ACID ACTIVATED AND DISTILLING OFF SUBSTANTIALLY ALL OF THE TOLUENE, FILTERING THE SOLUTION, AND REMOVING THE NAPHTHA FROM THE FILTRATE AND THEREBY RECOVERING DIPENTENE POLYMER.
Claim 4
Dependent Claim
116 words
THE PROCESS OF PRODUCING DIPENTENE POLYMER RESINS COMPRISING GRADUALLY ADDING DIPENTENE TO A SOLVENT MEDIUM CONTAINING ALUMINUM CHLORIDE CATALYST WHILE MAINTAINING THE TEMPERATURE IN THE RANGE OF 30*-55*C., THEREBY POLYMERIZING THE DIPENTENE, SAID SOLVENT MEDIUM CONSTITUTING FROM 60% TO 100% BY WEIGHT OF THE DIPENTENE AND INCLUDING TOLUENE IN AN AMOUNT IN THE RANGE 25% TO 50% BY WEIGHT OF THE DIPENTENE WITH THE REMAINDER OF THE SOLVENT MEDIUM BEING PETROLEUM NAPHTHA, HEATING THE RESULTING POLYMER SOLUTION TO A TEMPERATURE IN THE RANGE OF 110*-200*C. IN THE PRESENCE OF LIME AND ACID ACTIVATED AND DISTILLING OFF SUBSTANTIALLY ALL OF THE TOLUENE, FILTERING THE SOLUTION, AND REMOVING THE NAPHTHA FROM THE FILTRATE AND THEREBY RECOVERING DIPENTENE POLYMER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |