US3007891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmented polyethylene terephthalates and process for preparing them
Assignee: Hoechst AG
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Filing: 1958-12-23
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Granted: 1961-11-07
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Expires: 1978-12-23
Abstract
No abstract record available.
Inventors
- 👤 Gerstenberg Helmut
- 👤 Grunewald Karl Heinrich
- 👤 Medem Heinz
- 👤 Lademann Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:36
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/04; C; C08; C08G; C08G85/00; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/36; C08K5/41; C08K5/42; D01F6/00; D01F6/58; D01F6/62; D01F6/88; D01F6/92
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
IN A PROCESS FOR PREPARING PIGMENTED POLYESTERS BY CONDENSING A DIHYDRIC ALIPHATIC ALCOHOL CONTAINING 2 TO 4 CARBON ATOMS WITH A DICARBOXYLIC ACID, A PART OF SAID ALCOHOL BEING MIXED WITH UP TO 6 PERCENT BY WEIGHT, REFERRED TO THE POLYESTER, OF A PIGMENT TO FORM A DISDISPERSION, THE IMPROVEMENT WHICH COMPRISES PREPARING SAID DISPERSION OF PIGMENT AND ALCOHOL BY ADMIXING 0.05 TO 5 PERCENT BY WEIGHT, REFERRED TO THE ALCOHOL, OF A DISPERSING AGENT OBTAINED BY HEATING IN AN AQUEOUS MEDIUM CONAGENT OBTAINED BY HEATING IN AN AQUEOUS MEDIUM CONFORMULA
Claim 2
Dependent Claim
91 words
IN A PROCESS FOR PREPARING PIGMENTED POLYESTERS BY CONDENSING A DIHYDRIC ALIPHATIC ALCOHOL CONTAINING 2 TO 4 CARBON ATOMS WITH A DICARBOXYLIC ACID, A PART OF SAID ALCOHOL BEING MIXED WITH UP TO 6 PERCENT BY WEIGHT, REFERRED TO THE POLYESTER, OF A PIGMENT TO FORM A DISDISPERSION, THE IMPROVEMENT WHICH COMPRISES PREPARING SAID DISPERSION OF PIGMENT AND ALCOHOL BY ADMIXING 0.05 TO 5 PERCENT BY WEIGHT, REFERRED TO THE ALCOHOL, OF A DISPERSING AGENT OBTAINED BY HEATING IN AN AQUEOUS MEDIUM CONAGENT OBTAINED BY HEATING IN AN AQUEOUS MEDIUM CONFORMULA
Claim 3
Dependent Claim
12 words
THE PROCESS AS CLAIMED IN CLAIM 1, WHEREIN SAID PIGMENT IS LAMP-BLACK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |