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US5773563A
Expired / Lapsed
US
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Absorbable ε-caprolactone polymers
Assignee: Poly Med Inc
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Filing: 1996-06-03
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Granted: 1998-06-30
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Expires: 2016-06-03
Abstract
Abstract Crystane, low melting ε-Caprolactone polymers which undergo accelerated hydrolysis, and their use as lubricant coatings and/or as coatings containing bioactive agents, as carriers of viable cells, and as coatings for open-cell microporous template or constucts for tissue regeneration; the polymers bearing basic functionalities can be linked ionically or covalently to the ester chain which induces autocatalyzed hydrolysis.
Inventors
- 👤 Shalaby W. Shalaby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; A61L17/00; A61L17/06; A61L17/10; A61L17/12; A61L17/14; A61L17/145; A61L24/00; A61L24/04; A61L24/046; A61L27/14; A61L27/18; A61L27/50; A61L29/00; A61L29/08; A61L29/085; C; C08; C08G; C08G63/00; C08G63/91; C08G63/912
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
25 words
Crystalline nitrogenous polyesters comprising predominantly ε-caprolactone polymer sequences linked ionically or covalently to amine-bearing structures which represent 1 to 20 percent of the total weight.
Claim 2
Dependent Claim
25 words
Crystalline nitrogenous polyesters comprising predominantly ε-caprolactone polymer sequences linked ionically or covalently to amine-bearing structures which represent 1 to 20 percent of the total weight.
Claim 3
Dependent Claim
23 words
The nitrogenous polyester polymers of claim 1, wherin the amine-bearing structures represent 2 to 10 percent of the total weight of the system.
Claim 4
Dependent Claim
26 words
The nitrogenous polyester polymers of claim 1, wherein the amount of ε-caprolactone-based components of the polymer represent 90 to 99 percent of the polyester chain sequences.
Claim 5
Dependent Claim
26 words
The nitrogenous polyester polymers of claim 1, wherein the amount of ε-caprolactone-based components of the polymer represent 95 to 99 percent of the polyester chain sequences.
Claim 6
Dependent Claim
20 words
The nitrogenous polyester polymers of claim 1, wherein a minor component of the polyester chain is made of glycolate sequences.
Claim 7
Dependent Claim
17 words
The nitrogenous polyester polymers of claim 1, wherein the polyester chain is terminated with a carboxyl group.
Claim 8
Dependent Claim
28 words
The nitrogenous polyester polymers of claim 1, wherein the polyester chain is terminated with a carboxyl group and wherein the polyester is ionically linked to an amine-bearing molecule.
Claim 9
Dependent Claim
29 words
The nitrogenous polyester polymers of claim 1, wherein the polyester chain is terminated with a carboxyl group and the polyester is ionically linked to lysine or its potassium salt.
Claim 10
Dependent Claim
18 words
The nitrogenous polyester polymers of claim 1, wherein the amine-bearing structures are covalently bonded to the chain end.
Claim 11
Dependent Claim
27 words
The nitrogenous polyester polymers of claim 1, wherein the amine-bearing structures are covalently bonded to the chain end and the amine-bearing structure is based on 1-methyl-4-aminomethyl piperidine.
Claim 12
Dependent Claim
20 words
The nitrogenous polyester polymers of claim 1, wherein the amine-bearing structures are internally placed in the polyester through covalent bonding.
Claim 13
Dependent Claim
15 words
The nitrogenous polyester polymers of claim 1, wherein the amine-bearing structure is based on 3,3'-diamino-N-methyl-dipropylamine.
Claim 14
Dependent Claim
22 words
The nitrogenous polyester polymers of claim 1 having an inherent viscosity on hexafluoroisopropyl alcohol at (0.1 g/dl concentration) of 0.05 to 0.35.
Claim 15
Dependent Claim
23 words
The nitrogenous polyester polymers of claim 1 having an inherent viscosity on hexafluoroisopropyl alcohol at (0.1 g/dl concentration) of 0.1 to 0.20 dl/g.
References Cited (Backward Citations)
US4624256A
Cited
US4788979A
Cited
US4791929A
Cited
US4994074A
Cited
US5425984A
Cited
US5522842A
Cited
US5595751A
Cited
US5612052A
Cited
US5633343A
Cited
US5639851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-06-29 | 2001-12-29 | 2002-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-29 | 2005-12-29 | 2006-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-29 | 2009-12-29 | 2010-06-30 | $7700.00 | Window Closed / Lapsed |