Patent US2802812A successfully refreshed from Google Patents.
US2802812A
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P-alkyl styrenes and their polymers
Assignee: L A Dreyfus Co
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Filing: 1953-06-26
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Granted: 1957-08-13
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Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
- 👤 Charles G Overberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:19
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/12; C07; C07C; C07C15/00; C07C15/40; C07C15/42; C07C15/44; C07C15/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
P-ALKYL STYRENES WHEREIN THE ALKYL GROUP IS A PRIMARY NORMAL ALKYL GROUP OF AT LEAST TEN CARBON ATOMS, THE P-ALKYL STYRENES WITH AN ALKYL GROUP UP TO N-C12H25 HAVING A DENSITY (D425) OF LESS THAN 0.9000, AND THE P-ALKYL STYRENES WITH MORE THAN TWELVE CARBON ATOMS HAVING A MELTING POINT ABOVE ABOUT 26*C.
Claim 2
Dependent Claim
53 words
P-ALKYL STYRENES WHEREIN THE ALKYL GROUP IS A PRIMARY NORMAL ALKYL GROUP OF AT LEAST TEN CARBON ATOMS, THE P-ALKYL STYRENES WITH AN ALKYL GROUP UP TO N-C12H25 HAVING A DENSITY (D425) OF LESS THAN 0.9000, AND THE P-ALKYL STYRENES WITH MORE THAN TWELVE CARBON ATOMS HAVING A MELTING POINT ABOVE ABOUT 26*C.
Claim 3
Dependent Claim
19 words
POLYMERS OF P-ALKYL STYRENES, THE ALKYL GROUP BEING A PRIMARY NORMAL ALKYLK GROUP OF AT LEAST TEN CARBON ATOMS.
Claim 4
Dependent Claim
19 words
POLYMERS OF P-ALKYL STYRENES, THE ALKYL GROUP BEING A PRIMARY NORMAL ALKYLK GROUP OF AT LEAST TEN CARBON ATOMS.
References Cited (Backward Citations)
CH217134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |