Patent US3629186A successfully refreshed from Google Patents.
US3629186A
Expired / Lapsed
US
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Polyolefin pigment concentrates
Assignee: Eastman Kodak Co
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Filing: 1969-05-19
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Granted: 1971-12-21
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Expires: 1989-05-19
Abstract
Abstract A CONCENTRATE FOR DISPERSING PARTICULATE MATERIALS, SUCH AS PIGMENT, IN POLYMERIC MASSES INCLUDES LOW MOLECULAR WEIGHT CRYSTALLINE POLYPROPYLENE HAVING AN INHERENT VISCOSITY WITHIN THE RANGE OF 0.2 TO 1.1 AND AMORPHOUS POLYPROPYLENE HAVING A VISCOSITY AT 150*F. OF FROM 5,000 TO 300,000 CPS.
Inventors
- 👤 David C Hull
- 👤 Hugh J Hagemeyer Jr
- 👤 Raymond L Etter Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:36
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J2423/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |