Patent US2722673A successfully refreshed from Google Patents.
Patent US2773052A successfully refreshed from Google Patents.
US2773052A
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Copolymers of propenylbenzene
Assignee: Ethyl Corp
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Filing: 1953-07-01
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Granted: 1956-12-04
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Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Lester S Cohen
- 👤 Albert P Giraitis
- 👤 Jr Joseph R Zietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:37
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F10/00; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F212/08; C08F216/00; C08F216/36; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F236/00; C08F236/02; C08F236/04; C08F236/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A COPOLYMER OF PROPENYLBENZENE AND ANOTHER POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE AND STYRENE, SAID COPOLYMER BEING FORMED AT A TEMPERATURE BETWEEN ABOUT -190* C. AND 150* C. AND IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE AND A MIXTURE OF AN ALUMINUM HALIDE AND THE CORRESPONDING HALIDE ACID, SAID PROPENYLBEZENE BEING PRESENT IN SAID COPOLYMER IN A CONCENTRATION OF FROM ABOUT 2 TO ABOUT 97 PERCENT BY WEIGHT, THE BALANCE OF SAID COPOLYMER BEING SAID POLYMERIZABLE MONOMER.
Claim 2
Dependent Claim
88 words
A COPOLYMER OF PROPENYLBENZENE AND ANOTHER POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE AND STYRENE, SAID COPOLYMER BEING FORMED AT A TEMPERATURE BETWEEN ABOUT -190* C. AND 150* C. AND IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE AND A MIXTURE OF AN ALUMINUM HALIDE AND THE CORRESPONDING HALIDE ACID, SAID PROPENYLBEZENE BEING PRESENT IN SAID COPOLYMER IN A CONCENTRATION OF FROM ABOUT 2 TO ABOUT 97 PERCENT BY WEIGHT, THE BALANCE OF SAID COPOLYMER BEING SAID POLYMERIZABLE MONOMER.
References Cited (Backward Citations)
FR743302A
Cited
US2383084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |