US4079038A
Expired / Lapsed
US
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Poly(carbonates)
Assignee: Alza Corp
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Filing: 1976-03-05
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Granted: 1978-03-14
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Expires: 1996-03-05
Abstract
Abstract Poly(orthoester carbonates) and poly(orthocarbonate carbonates) having a repeating linear carbonate unit and a recurring symmetrical dioxycarbon moiety with a plurality of organic groups pendant from the carbon atom thereof are disclosed. The polymers are represented by the structural formula: ##STR1## WHEREIN A IS 0 TO 1, B IS 2 TO 6 WHEN A IS 0, B IS 2 TO 5 WHEN A IS 1, AND N IS GREATER THAN 10.
Inventors
- 👤 Nam Sok Choi
- 👤 Jorge Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
C; C07; C07C; C07C68/00; C07C68/06; C07C68/02; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/20; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/16; C07D309/28; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C08; C08G; C08G64/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
202 words
A copolymer of the general formula: ##STR38## wherein R 1 is a member selected from the group consisting of alkylene of 1 to 10 carbons; alkenylene of 2 to 10 carbons; alkyleneoxa of 2 to 20 carbons; alkenyleneoxa of 4 to 20 carbons; cycloalkylene of 3 to 7 carbons; cycloalkylene of 3 to 7 carbons substituted with alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, alkenyl of 2 to 10 carbons, alkenylene of 2 to 10 carbons, and alkoxy of 1 to 10 carbons; cycloalkenylene of 5 to 7 carbons; cycloalkenylene of 5 to 7 carbons substituted with an alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, alkenyl of 2 to 10 carbons, cycloalkenylene of 2 to 10 carbons, and alkoxy of 1 to 10 carbons; arylene; and arylene of 6 to 26 carbons substituted with an alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, an alkenyl of 2 to 10 carbons and alkoxy of 1 to 10 carbons; and wherein a is 0 to 1, b is 2 to 6 when a is 0, b is 2 to 5 when a is 1, and n is at least 10.
Claim 2
Dependent Claim
202 words
A copolymer of the general formula: ##STR38## wherein R 1 is a member selected from the group consisting of alkylene of 1 to 10 carbons; alkenylene of 2 to 10 carbons; alkyleneoxa of 2 to 20 carbons; alkenyleneoxa of 4 to 20 carbons; cycloalkylene of 3 to 7 carbons; cycloalkylene of 3 to 7 carbons substituted with alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, alkenyl of 2 to 10 carbons, alkenylene of 2 to 10 carbons, and alkoxy of 1 to 10 carbons; cycloalkenylene of 5 to 7 carbons; cycloalkenylene of 5 to 7 carbons substituted with an alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, alkenyl of 2 to 10 carbons, cycloalkenylene of 2 to 10 carbons, and alkoxy of 1 to 10 carbons; arylene; and arylene of 6 to 26 carbons substituted with an alkyl of 1 to 10 carbons, alkylene of 1 to 10 carbons, an alkenyl of 2 to 10 carbons and alkoxy of 1 to 10 carbons; and wherein a is 0 to 1, b is 2 to 6 when a is 0, b is 2 to 5 when a is 1, and n is at least 10.
Claim 3
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR39##
Claim 4
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR40##
Claim 5
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR41##
Claim 6
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR42##
Claim 7
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR43##
Claim 8
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR44##
Claim 9
Dependent Claim
21 words
A polymer according to claim 1 of the following formula wherein c is a positive integer of 1 to 10: ##STR45##
Claim 10
Dependent Claim
11 words
A polymer according to claim 1 of the following formula: ##STR46##
Claim 11
Dependent Claim
11 words
A polymer according to claim 1 of the following formula: ##STR47##
Claim 12
Dependent Claim
11 words
A polymer according to claim 1 of the following formula: ##STR48##
References Cited (Backward Citations)
US3546188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |