US3726805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of amino acid-containing microcapsules
Assignee: Fujifilm Holdings Corp
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Filing: 1971-03-17
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Granted: 1973-04-10
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Expires: 1991-03-17
Abstract
Abstract A PROCESS FOR PRODUCING AMINO ACID-CONTAINING MICROCAPSULES WHICH COMPRISES MELTING A HARDENED OIL HAVING A MELTING POINT OF HIGHER THAN 40*C. AND DISPERSING THEREIN A POWDERED WATER-SOLUBLE AMMINO ACID TO PROVIDE A FIRST DISPERSION, DISPERSING SAID FIRST DISPRSION IN A SOLVENT MIXTURE OF METHANOL AND A POLYHYDRIC ALCOHOL TO FORM A SECOND DISPERSION, SAID SOLVENT MIXTURE BEING HEATED TO A TEMPERATURE HIGHER THAN THE MELTING POINT OF SAID HARDENED OIL, AND COOLING SAID SECOND DISPERSION TO A TEMPERATURE LOWER THAN THE MELTING POINT OF THE HARDENED OIL TO THEREBY FORM SAID MICROCAPSULES.
Inventors
- 👤 A Kondo
- 👤 Y Maekawa
- 👤 S Miyano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:21
CPC Classifications
A; A23; A23K; A23K20/00; A23K20/10; A23K20/142; A23K40/00; A23K40/30; A23K40/35; Y; Y10; Y10S; Y10S516/00; Y10S516/924; Y10S516/926; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |