US4835203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycaprolactone modeling and molding compositions
Assignee: AMERICAN ART CLAY Co Inc
•
Filing: 1987-06-15
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Granted: 1989-05-30
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Expires: 2007-06-15
Abstract
Abstract The invention involves modeling and molding extruded compositions comprising previous extruded polycaprolactone extrusion blended with a small amount of a detackifier comprising a fatty acid salt or amide.
Inventors
- 👤 David L. Sieverding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
29 words
A composition suitable for modeling shaped articles comprising extruded high molecular weight polycaprolactone which is additionally extrusion blended with a small amount of detackifier comprising a fatty acid amide.
Claim 2
Dependent Claim
29 words
A composition suitable for modeling shaped articles comprising extruded high molecular weight polycaprolactone which is additionally extrusion blended with a small amount of detackifier comprising a fatty acid amide.
Claim 3
Dependent Claim
43 words
The composition of claim 1 wherein the fatty acid amide is an amide compound in which there are from 1 to 3 fatty acid carboxamide moieties and an alkyl or alkylene group attached to an amido nitrogen containing at least 4 carbon atoms.
Claim 4
Dependent Claim
58 words
The composition of claim 2 wherein the fatty acid amide is one of R--C(O)N(CH 2 CH 3 ) 2 (R--C(O)) 2 NCH 2 CH 2 CH 3 R--C(O)NHCH 2 CH 2 NH 2 R--C(O)NHCH 2 CH 2 NH(O)C--R R--C(O)NHCH 2 CH 2 NHCH 2 CH 2 NH(O)C--R R--C(O)NHCH 2 CH 2 NCH 2 CH 2 NH(O)C--R L (O)C--R.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein the fatty acid amide is N,N'-bis(oleoyl)ethylenediamine.
Claim 6
Dependent Claim
39 words
The composition of claim 4 wherein the fatty acid amide is present in the amount of from about 0.25 to about 5 weight % of the weight of the blend of the high molecular weight polycaprolactone and the detackifier.
Claim 7
Dependent Claim
21 words
The composition of claim 5 wherein the amount of the fatty acid amide is about 0.5 to about 2.5 weight %.
Claim 8
Dependent Claim
18 words
The composition of claim 8 wherein the amount of the fatty acid amide is about 1 weight %.
Claim 9
Dependent Claim
38 words
The composition of claim 1 wherein the high molecular weight polycaprolactone has a molecular weight corresponding to a reduced viscosity at a concentration of 0.2 gm/dl of benzene, determined at 30° C., of between about 0.5 and 10.
Claim 10
Dependent Claim
22 words
The composition of claim 8 wherein the high molecular weight polycaprolactone has a reduced viscosity of between about 1.5 and about 5.
Claim 11
Dependent Claim
16 words
The composition of claim 9 wherein the reduced viscosity is between about 3 and about 4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |