Patent US3847694A successfully refreshed from Google Patents.
Patent US3020247A successfully refreshed from Google Patents.
US3020247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of expandable polystyrene
Assignee: Beazer East Inc
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Filing: 1960-06-06
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Granted: 1962-02-06
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Bianco Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF DYEING EXPANDABLE POLYSTYRENE PARTICLES WHICH ARE CAPABLE OF FURTHER EXPANSION COMPRISING IMMERSING SAID PARTICLES FOR AT LEAST 1.5 MINUTES IN AN AQUEOUS DYE SOLUTION COMPRISING FROM 0.1-7.5% BY WEIGHT OF WATER OF A WATER INSOLUBLE, ORGANIC SOLVENT SOLUBLE DYE, AND FROM 0.1-.5 MOLE PER LITER OF WATER OF A SOLVENT SELECTED FROM THYE GROUP CONSISTING OF DIMETHYL FORMAMIDE, DIMETHYL ACETONATE, DIMETHYL SULFOXIDE AND N-METHYLPYRROLIDONE, SAID DYEING SOLUTION BEING HEATED AND MAINTAINED AT A TEMPERATURE OF LESS THAN 90* C.
Claim 2
Independent Claim
82 words
A METHOD OF DYEING EXPANDABLE POLYSTYRENE PARTICLES WHICH ARE CAPABLE OF FURTHER EXPANSION COMPRISING IMMERSING SAID PARTICLES FOR AT LEAST 1.5 MINUTES IN AN AQUEOUS DYE SOLUTION COMPRISING FROM 0.1-7.5% BY WEIGHT OF WATER OF A WATER INSOLUBLE, ORGANIC SOLVENT SOLUBLE DYE, AND FROM 0.1-.5 MOLE PER LITER OF WATER OF A SOLVENT SELECTED FROM THYE GROUP CONSISTING OF DIMETHYL FORMAMIDE, DIMETHYL ACETONATE, DIMETHYL SULFOXIDE AND N-METHYLPYRROLIDONE, SAID DYEING SOLUTION BEING HEATED AND MAINTAINED AT A TEMPERATURE OF LESS THAN 90* C.
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |