Patent US3923726A successfully refreshed from Google Patents.
US3923726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making colored high temperature polymers
Assignee: 3M Co
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Filing: 1969-06-09
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Granted: 1975-12-02
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Expires: 1989-06-09
Abstract
Abstract High melting polymers such as polyester, polyamide or polysulfone are uniformly internally colored by blending therewith a minor amount of easily colored lower-softening thermoplastic additive polymer such as polyethylene, containing an effective amount of coloring material uniformly blended therethrough. High temperature polymers colored in this manner provide shaped articles such as films, fibers, and machine parts having a visually uniform color.
Inventors
- 👤 Gerhard Benz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:08
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K5/00; C08K5/0008; C08L; C08L23/00; C08L25/00; C08L55/00; C08L55/02; C08L67/00; C08L67/02; C08L77/00; D; D01; D01F; D01F1/00; D01F1/02; D01F1/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS OF FORMING AN ORIENTED FILM HAVING A VISUALLY UNIFORM COLORING BY COEXTRUDING A FILM CONSISTING ESSENTIALLY OF A NORMALLY UNCOLORED, RELATIVELY HIGH MELTING, DIFFICULTY COLORABLE, THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYESTERS, POLYSULFONES AND POLYAMIDES WITH A MINOR AMOUNT OF A UNIFORMLY COLORED, LOWER SOFTENING EASILY COLORABLE THERMOPLASTIC ADDITIVE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYSTYRENE, AND ACRYLONITRILE-BUTADIENE-STYRENE COPOLYMERSS, WHEREBY THE COLORED ADDITIVE POLYMER IS UNIFORMLY DISPERSED THROUGHOUT THE DIFFICULTY COLORABLE POLYMER, AND THEREAFTER ORIENTING SAID FILM.
Claim 2
Dependent Claim
84 words
A PROCESS OF FORMING AN ORIENTED FILM HAVING A VISUALLY UNIFORM COLORING BY COEXTRUDING A FILM CONSISTING ESSENTIALLY OF A NORMALLY UNCOLORED, RELATIVELY HIGH MELTING, DIFFICULTY COLORABLE, THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYESTERS, POLYSULFONES AND POLYAMIDES WITH A MINOR AMOUNT OF A UNIFORMLY COLORED, LOWER SOFTENING EASILY COLORABLE THERMOPLASTIC ADDITIVE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYSTYRENE, AND ACRYLONITRILE-BUTADIENE-STYRENE COPOLYMERSS, WHEREBY THE COLORED ADDITIVE POLYMER IS UNIFORMLY DISPERSED THROUGHOUT THE DIFFICULTY COLORABLE POLYMER, AND THEREAFTER ORIENTING SAID FILM.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |