US2932631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of beta-pinene
Assignee: Hercules Powder Co
•
Filing: 1957-12-26
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Granted: 1960-04-12
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Rummelsburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF PREPARING A HARD, STABLE, LIGHTCOLORED RESIN WHICH COMPRISES CONTACTING B-PINENE WITH A CATALYTIC AMOUNT OF RALCL2 IN WHICH R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF THE LOWER ALKYL RADICALS HAVING 1 TO 4 CARBON ATOMS AT A TEMPERATURE IN THE RANGE OF ABOUT -80 TO ABOUT 150* C. UNTIL POLYMERIZATION OF B-PINENE IS EFFECTED AND SEPARATING SAID RESIN BY DISTILLING OFF THE UNREACTED PINENE.
Claim 2
Independent Claim
71 words
THE METHOD OF PREPARING A HARD, STABLE, LIGHTCOLORED RESIN WHICH COMPRISES CONTACTING B-PINENE WITH A CATALYTIC AMOUNT OF RALCL2 IN WHICH R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF THE LOWER ALKYL RADICALS HAVING 1 TO 4 CARBON ATOMS AT A TEMPERATURE IN THE RANGE OF ABOUT -80 TO ABOUT 150* C. UNTIL POLYMERIZATION OF B-PINENE IS EFFECTED AND SEPARATING SAID RESIN BY DISTILLING OFF THE UNREACTED PINENE.
References Cited (Backward Citations)
US2405558A
Cited
US2388428A
Cited
US2794819A
Cited
BE538782A
Cited
US2848472A
Cited
US2852544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |