US3830765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene colouring granules
Assignee: Messrs Color Service GmbH
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Filing: 1973-02-15
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Granted: 1974-08-20
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Expires: 1993-02-15
Abstract
Abstract GRANULES FOR COLOURING POLYSTYRENE MOULDINGS COMPRISE DYESTUFF OR PIGMENT, POLYSTYRENE, AND ENOUGH OF A COMPATIBLE HIGH MOLECULAR WEIGHT SUBSTANCE TO LOWER THE MELTING POINT OF THE GRANULES TO 130* TO 200*C.
Inventors
- 👤 K Fejer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:38
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06
Claims Analysis
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |