Patent US2534447A successfully refreshed from Google Patents.
US2534447A
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Copolymers of isobutylene and an ester derived by esterifying abietyl alcohol and an alpha, beta-ethylenically unsaturated carboxylic acid
Assignee: Hercules Powder Co
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Filing: 1948-12-24
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Granted: 1950-12-19
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Expires: 1968-12-24
Abstract
No abstract record available.
Inventors
- 👤 George E Hulse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:54
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/10; C08F22/26; Y; Y10; Y10S; Y10S260/00; Y10S260/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A COPOLYMER OF ISOBUTYLENE AND AN ESTER DERIVED BY ESTERIFYING AN ABIETYL ALCOHOL WITH AN A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, SAID COPOLYMER BEING LINEAR IN CHARACTER AND CONTAINING ONE MOLECULE OF THE ESTER AND ONE MOLECULE OF ISOBUTYLENE PER COPOLYMER UNIT, SAID ABIETYL ALCOHOL BEING A MEMBER OF THE GROUP CONSISTING OF ABIETYL ALCOHOL, DIHYDROABIETYL ALCOHOL, TETRAHYDROABIETYL ALCOHOL, DEHYDROABIETYL ALCOHOL, AND MIXTURES OF SUCH ALCOHOLS.
Claim 2
Dependent Claim
64 words
A COPOLYMER OF ISOBUTYLENE AND AN ESTER DERIVED BY ESTERIFYING AN ABIETYL ALCOHOL WITH AN A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, SAID COPOLYMER BEING LINEAR IN CHARACTER AND CONTAINING ONE MOLECULE OF THE ESTER AND ONE MOLECULE OF ISOBUTYLENE PER COPOLYMER UNIT, SAID ABIETYL ALCOHOL BEING A MEMBER OF THE GROUP CONSISTING OF ABIETYL ALCOHOL, DIHYDROABIETYL ALCOHOL, TETRAHYDROABIETYL ALCOHOL, DEHYDROABIETYL ALCOHOL, AND MIXTURES OF SUCH ALCOHOLS.
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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |