US2550557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating polymerized terpene resin
Assignee: Crosby Chemicals Inc
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Filing: 1949-07-15
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Granted: 1951-04-24
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Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
- 👤 Burt L Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:48
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/26; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/947
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS OF DECOLORIZING SOLID CYCLIC TERPEN POLYMERS DERIVED FROM POLYMERIZABLE CYCLIC TERPENES, WHICH COMPRISES REACTING IN MOLTEN CONDITION, A NORMALLY SOLID CYCLIC TERPENE POLYMER DERIVED FROM POLYMERIZABLE CYCLIC TERPENES WITH CATALYTIC AMOUNTS OF ABOUT 0.01% TO 5% OF SELENIUM IN AN INERT ATMOSPHERE AT A REACTION TEMPERATURE OF FROM APPROXIMATELY 200* C. TO APPROXIMATELY 360* C. BY CONTACTING THE SAID CYCLIC TERPENE POLYMER WITH THE SELENIUM UNTIL SUBSTANTIAL DECOLORIZATION OF THE SAID CYCLIC TERPENE POLYMER IS EFFECTED.
Claim 2
Dependent Claim
78 words
A PROCESS OF DECOLORIZING SOLID CYCLIC TERPEN POLYMERS DERIVED FROM POLYMERIZABLE CYCLIC TERPENES, WHICH COMPRISES REACTING IN MOLTEN CONDITION, A NORMALLY SOLID CYCLIC TERPENE POLYMER DERIVED FROM POLYMERIZABLE CYCLIC TERPENES WITH CATALYTIC AMOUNTS OF ABOUT 0.01% TO 5% OF SELENIUM IN AN INERT ATMOSPHERE AT A REACTION TEMPERATURE OF FROM APPROXIMATELY 200* C. TO APPROXIMATELY 360* C. BY CONTACTING THE SAID CYCLIC TERPENE POLYMER WITH THE SELENIUM UNTIL SUBSTANTIAL DECOLORIZATION OF THE SAID CYCLIC TERPENE POLYMER IS EFFECTED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |