US4076798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight polyester resin, the method of making the same and the use thereof as a pharmaceutical composition
Assignee: Wyeth Holdings LLC
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Filing: 1976-11-02
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Granted: 1978-02-28
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Expires: 1996-11-02
Abstract
Abstract A normally solid biodegradable hydrolyzable polyester resin of diglycolic acid and an unhindered glycol having a molecular weight sufficiently high so as to provide a polymeric material possessing self-supporting film forming properties and the process of preparing the same and the use of the polymeric material as a device for the controlled continuous administration of a predetermined dosage of a drug to a living animal.
Inventors
- 👤 Donald J. Casey
- 👤 George C. Gleckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7007; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2031; A61K9/204; C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
A pharmaceutical composition for the controlled continuous administration of a predetermined dosage of a drug to a living animal comprising a normally solid biodegradable, hydrolyzable polyester resin of diglycollic acid and an unhindered glycol, having a molecular weight sufficiently high so as to provide a polymeric material possessing self-supporting film forming properties, which has dispersed uniformly throughout said polyester resin, a drug formulation.
Claim 2
Dependent Claim
63 words
A pharmaceutical composition for the controlled continuous administration of a predetermined dosage of a drug to a living animal comprising a normally solid biodegradable, hydrolyzable polyester resin of diglycollic acid and an unhindered glycol, having a molecular weight sufficiently high so as to provide a polymeric material possessing self-supporting film forming properties, which has dispersed uniformly throughout said polyester resin, a drug formulation.
Claim 3
Dependent Claim
42 words
A pharmaceutical composition according to claim 1 in which the polyester resin contains a reacted content of up to 25 mole percent of at least one α,β-ethylenically unsaturated dicarboxylic acid based on the total moles of all of the dicarboxylic acids present.
Claim 4
Dependent Claim
14 words
A pharmaceutical composition according to claim 1 in the form of a self-supporting film.
Claim 5
Dependent Claim
42 words
A pharmaceutical composition according to claim 1 in which the polyester resin contains a reacted content of up to 10 mole percent of at least one α,β-ethylenically unsaturated dicarboxylic acid based on the total moles of all of the dicarboxylic acids present.
References Cited (Backward Citations)
US2720502A
Cited
US2720504A
Cited
GB835442A
Cited
US3280077A
Cited
US3773919A
Cited
US3755558A
Cited
US4010196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |