Patent US2555221A successfully refreshed from Google Patents.
US2555221A
Expired / Lapsed
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Method of recovering terpene polymer and copolymer resins
Assignee: Pennsylvania Industrial Chemical Corp
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Filing: 1949-09-02
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Granted: 1951-05-29
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Expires: 1969-09-02
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Burroughs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:04
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF RECOVERING HARD TERPENE RESIN AND TERPENE COPOLYER RESIN FREE FROM INCLUDED SPECKS AND CHLORINE CONTAMINATION FROM TERPENE POLYMER AND COPOLYMER SOLUTIONS CONTAMINATED BY CHLORINE FROM POLYMERIZATION WITH AN ACID-ACTING METAL CHLORIDE CATALYST, BY AGITATING A SAID POLYMER SOLUTION IN CONTACT WITH FULLER''S EARTH AND LIME AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 155* C. TO 175* C. UNDER ANHYDROUS CONDITIONS, SEPARATING THE SAID POLYMER SOLUTION SO TREATED FROM FULLER''S EARTH AND LIME SLUDGE, AND RECOVERING HARD RESIN POLYMERS FROM THE SAID POLYMER SOLUTION BY DISTILLATION.
Claim 2
Independent Claim
89 words
THE METHOD OF RECOVERING HARD TERPENE RESIN AND TERPENE COPOLYER RESIN FREE FROM INCLUDED SPECKS AND CHLORINE CONTAMINATION FROM TERPENE POLYMER AND COPOLYMER SOLUTIONS CONTAMINATED BY CHLORINE FROM POLYMERIZATION WITH AN ACID-ACTING METAL CHLORIDE CATALYST, BY AGITATING A SAID POLYMER SOLUTION IN CONTACT WITH FULLER''S EARTH AND LIME AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 155* C. TO 175* C. UNDER ANHYDROUS CONDITIONS, SEPARATING THE SAID POLYMER SOLUTION SO TREATED FROM FULLER''S EARTH AND LIME SLUDGE, AND RECOVERING HARD RESIN POLYMERS FROM THE SAID POLYMER SOLUTION BY DISTILLATION.
References Cited (Backward Citations)
US2060404A
Cited
US2264774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |