Patent US4285569A successfully refreshed from Google Patents.
Patent US2915482A successfully refreshed from Google Patents.
US2915482A
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Depigmenting polymeric compositions with amine settling aids
Assignee: Dow Chemical Co
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Filing: 1957-04-05
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Granted: 1959-12-01
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Floyd B Nagle
- 👤 Norman R Ruffing
- 👤 Palmer W Wright
- 👤 Bernie A Kozakiewicz
- 👤 Arthur F Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:58
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08J11/08; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
METHOD FOR DEPIGMENTING SYNTHETIC, THERMOPLASTIC POLYMERIC COMPOSITIONS WHICH COMPRISES DISSOLVING A PIGMENTED POLYMERIC COMPOSITION CONTAINING AN INORGANIC PIGMENT THAT IS INSOLUBLE IN SOLVENTS IN WHICH SAID POLYMERIC COMPOSITION IS DISSOLVED IN A WATER-INSOLUBLE ORGANIC SOLVENT FOR SAID POLYMERIC COMPOSITION THAT IS NONREACTIVE WITH SAID POLYMER AND SAID PIGMENT AND IN WHICH SAID PIGMENT IS INSOLUBLE; INTIMATELY MIXING EACH PART BY WEIGHT OF THE RESULTING ORGANIC SOLUTION CONTAINING
Claim 2
Dependent Claim
67 words
METHOD FOR DEPIGMENTING SYNTHETIC, THERMOPLASTIC POLYMERIC COMPOSITIONS WHICH COMPRISES DISSOLVING A PIGMENTED POLYMERIC COMPOSITION CONTAINING AN INORGANIC PIGMENT THAT IS INSOLUBLE IN SOLVENTS IN WHICH SAID POLYMERIC COMPOSITION IS DISSOLVED IN A WATER-INSOLUBLE ORGANIC SOLVENT FOR SAID POLYMERIC COMPOSITION THAT IS NONREACTIVE WITH SAID POLYMER AND SAID PIGMENT AND IN WHICH SAID PIGMENT IS INSOLUBLE; INTIMATELY MIXING EACH PART BY WEIGHT OF THE RESULTING ORGANIC SOLUTION CONTAINING
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |