Patent US2914373A successfully refreshed from Google Patents.
US2914373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing plastic and solution therefor
Assignee: PPG Industries Inc
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Filing: 1956-01-30
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Granted: 1959-11-24
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Rieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:52
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/004; Y; Y10; Y10S; Y10S8/00; Y10S8/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A METHOD OF COLORING A PLASTIC SHEET WHICH COMPRISES PLACING A PLASTICIZED POLYVINYL ACETAL SHEET IN A VERTICAL PLANE, RAPIDLY LOWERING THE BOTTOM MARGINAL PORTION OF THE VERTICAL SHEET INTO A DYE SOLUTION COMPRISING AN UNSULFONATED PYRAZOLONE AZO DYE, A NONIONIC WETTING AGENT AND A SOLVEN CONSISTING ESSENTIALLY OF ABOUT 23 TO 27 VOLUME PERCENT WATER AND ABOUT 73 TO 77 VOLUME PERCENT ETHYLENE GLYCOL MONOETHYL ETHER, SAID SOLUTION BEING AT A PH OF GREATER THAN 9 AND LESS THAN 10.5, CONTINUING IMMERSION OF THE SHEET WHILE FIRST DECRESING THE RATE UNTIL THE SHEEET IS BEING SLOWLY IMMERSED AND THEN INCREASING THE RATE OF IMMERSION UNTIL THE ENTIRE SHEET IS IMMERSED, RAPIDLY REMOVING THE ENTIRE SHEET FROM THE DYE SOLUTION, SPRAYING SUBSTANTIALLY SIMULTANEOUSLY THE ENTIRE AREA OF EACH SIDE OF THE SHEET WITH A LIQUID CONSISTING ESSENTIALLY OF WATER, A NONIONIC WETTING AGENT AND AN ACID, SAID LIQUID HAVING A PH OF BETWEEN ABOUT 4 AN 5, AND DRYING THE LIQUID-SPRAYED SHEET.
Claim 2
Independent Claim
162 words
A METHOD OF COLORING A PLASTIC SHEET WHICH COMPRISES PLACING A PLASTICIZED POLYVINYL ACETAL SHEET IN A VERTICAL PLANE, RAPIDLY LOWERING THE BOTTOM MARGINAL PORTION OF THE VERTICAL SHEET INTO A DYE SOLUTION COMPRISING AN UNSULFONATED PYRAZOLONE AZO DYE, A NONIONIC WETTING AGENT AND A SOLVEN CONSISTING ESSENTIALLY OF ABOUT 23 TO 27 VOLUME PERCENT WATER AND ABOUT 73 TO 77 VOLUME PERCENT ETHYLENE GLYCOL MONOETHYL ETHER, SAID SOLUTION BEING AT A PH OF GREATER THAN 9 AND LESS THAN 10.5, CONTINUING IMMERSION OF THE SHEET WHILE FIRST DECRESING THE RATE UNTIL THE SHEEET IS BEING SLOWLY IMMERSED AND THEN INCREASING THE RATE OF IMMERSION UNTIL THE ENTIRE SHEET IS IMMERSED, RAPIDLY REMOVING THE ENTIRE SHEET FROM THE DYE SOLUTION, SPRAYING SUBSTANTIALLY SIMULTANEOUSLY THE ENTIRE AREA OF EACH SIDE OF THE SHEET WITH A LIQUID CONSISTING ESSENTIALLY OF WATER, A NONIONIC WETTING AGENT AND AN ACID, SAID LIQUID HAVING A PH OF BETWEEN ABOUT 4 AN 5, AND DRYING THE LIQUID-SPRAYED SHEET.
References Cited (Backward Citations)
US2609269A
Cited
GB717387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |