US2512459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion of pigments in ethylene polymers
Assignee: EIDP Inc
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Filing: 1949-02-23
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Granted: 1950-06-20
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hamilton George Erving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:26
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08J2491/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
PROCESS OF UNIFORMLY PIGMENTING TOUGH, SOLID ETHYLENE HOMOPOLYMER WHICH COMPRISES MECHANICALLY WORKING IN THE ABSENCE OF LIQUID DILUENTS AND OUR OF CONTACT WITH SAID ETHYLENE POLYMER IN THE FUSED STATE, A FINELY-DIVIDED, DIFFICULTY DISPERSIBLE PIGMENT AND A HYDROCARBON WAX HAVING A MELTING POINT OF 120*F.-200*F., THE PROPORTION OF WAX TO PIGMENT BEING AT LEAST 1:1, AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID WAX UNTIL SAID PIGMENT IS UNIFORMLY DISPERSED IN SAID WAX, AND THEREAFTER MIXING THE PIGMENT DISPERSION IN WAX WITH SAID ETHYLENE POLYMER IN THE FUSED STATE UNTIL A COMPOSITION SUBSTANTIALLY FREE OF PIGMENT AGGLOMERATES IS OBTAINED.
Claim 2
Dependent Claim
100 words
PROCESS OF UNIFORMLY PIGMENTING TOUGH, SOLID ETHYLENE HOMOPOLYMER WHICH COMPRISES MECHANICALLY WORKING IN THE ABSENCE OF LIQUID DILUENTS AND OUR OF CONTACT WITH SAID ETHYLENE POLYMER IN THE FUSED STATE, A FINELY-DIVIDED, DIFFICULTY DISPERSIBLE PIGMENT AND A HYDROCARBON WAX HAVING A MELTING POINT OF 120*F.-200*F., THE PROPORTION OF WAX TO PIGMENT BEING AT LEAST 1:1, AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID WAX UNTIL SAID PIGMENT IS UNIFORMLY DISPERSED IN SAID WAX, AND THEREAFTER MIXING THE PIGMENT DISPERSION IN WAX WITH SAID ETHYLENE POLYMER IN THE FUSED STATE UNTIL A COMPOSITION SUBSTANTIALLY FREE OF PIGMENT AGGLOMERATES IS OBTAINED.
References Cited (Backward Citations)
US2448799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |