US3561003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray drying process
Assignee: Philips North America LLC
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Filing: 1967-11-21
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Granted: 1971-02-02
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Expires: 1987-11-21
Abstract
Abstract PARTICULATE RESINS OF PARTICLE SIZE NO MORE THAN 30 MICRONS ARE PRODUCED BY SPRAY-DRYING A MIXTURE COMPRISING A SOLUTION OF THE RESIN AND A NON-SOLVENT FOR THE RESIN. PARTICULATE INKS MAY BE PREPARED BY INCORPORATING IN THE MIXTURE BEFORE SPRAY-DRYING A COLORANT AND/OR A FILLER. THE AMOUNT OF NON-SOLVENT IN THE MIXTURE DEPENDS ON THE PARTICULAR NON-SOLVENT, RESIN AND RESIN SOLUTION USED, BUT IT DOES NOT EXCEED THE AMOUNT REQUIRED TO CAUSE INCIPIENT PRECIPITATION OF THE RESIN FROM SOLUTION. RESINS SUCH AS POLYMERIC FATTY ACID AMIDES, EPOXY RESINS OR POLYSTYRENE ARE MOST ADVANTAGEOUSLY TREATED IN THIS PROCESS.
Inventors
- 👤 Bernard J Lanham
- 👤 Vladimir C Hykel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:04
CPC Classifications
B; B29; B29B; B29B9/00; C; C08; C08J; C08J3/00; C08J3/12; C08J3/122; Y; Y10; Y10S; Y10S106/00; Y10S106/901
Claims Analysis
Total Claims: 0
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |