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Patent US2851501A successfully refreshed from Google Patents.
US2851501A
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Production of poly alkyl indanes from styrene compounds
Assignee: POLAK'S FRUTAL WORKS Inc
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Filing: 1955-02-17
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Granted: 1958-09-09
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Expires: 1975-02-17
Abstract
No abstract record available.
Inventors
- 👤 Benz George
- 👤 Ernest H Polak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:06
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2531/00; C07C2531/02; C07C2531/04; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS OF PRODUCING MONOMERIC POLY ALKYL INDANES FROM STYRENES, WHICH COMPRISES REACTING IN THE PRESENCE OF AN ACID ACTING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF FROM -10*C. TO 90*C. WHICH TEMPERATURE IS MAINTAINED THROUGHOUT THE REACTION A STYRENE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
45 words
A PROCESS OF PRODUCING MONOMERIC POLY ALKYL INDANES FROM STYRENES, WHICH COMPRISES REACTING IN THE PRESENCE OF AN ACID ACTING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF FROM -10*C. TO 90*C. WHICH TEMPERATURE IS MAINTAINED THROUGHOUT THE REACTION A STYRENE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |