US4644050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(1-oxy-3-lactam vinylene)
Assignee: University of Southern Mississippi
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Filing: 1985-09-13
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Granted: 1987-02-17
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Expires: 2005-09-13
Abstract
Abstract Poly(1-oxy-3-lactam vinylenes) of the formula ##STR1## wherein n is 1, 2, or 3 are disclosed formed by the polymerization of 1-(2-chloroacetyl)lactams having 5, 6, or 7 carbon atoms in the lactam ring. The polymers are useful reactants in polyester and polyurethane formation.
Inventors
- 👤 Lon J. Mathias
- 👤 Douglas R. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G65/00; C08G71/00; C08G71/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
A polymer having repeating units of the formula ##STR5## wherein n is 1, 2, or 3.
Claim 2
Dependent Claim
16 words
A polymer having repeating units of the formula ##STR5## wherein n is 1, 2, or 3.
Claim 3
Dependent Claim
9 words
The polymer of claim 1 wherein n is 1.
Claim 4
Dependent Claim
9 words
The polymer of claim 1 wherein n is 2.
Claim 5
Dependent Claim
9 words
The polymer of claim 1 wherein n is 3.
Claim 6
Dependent Claim
27 words
The polymer of claim 1 having an inherent viscosity of about 0.03 to about 0.07 dl/g as determined in dimethyl sulfoxide at a concentration of 0.5 g/dl.
Claim 7
Dependent Claim
9 words
The polymer of claim 1 formed by polymerizing 1-(2-chloroacetyl)caprolactam.
Claim 8
Dependent Claim
9 words
The poymer of claim 1 formed by polymerizing 1-(2-chloroacetyl)piperidone.
Claim 9
Dependent Claim
9 words
The polymer of claim 1 formed by polymerizing 1-(2-chloroacetyl)-2-azacyclooctanone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |