US3789015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing microcapsules containing oily hydrophobic liquid
Assignee: Fujifilm Holdings Corp
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Filing: 1971-07-02
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Granted: 1974-01-29
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Expires: 1991-07-02
Abstract
Abstract THE PRESENCE INVENTION RELATES TO A PROCESS FOR PRODUCING MICROCAPSULES CONTAINING OILY HYDROPHOBIC LIQUID. THE PROCESS IS CHARACTERIZED BY ADDING A SHOCK-PREVENTING AGENT AND A COMPOUND HAVING AT LEAST ONE -COOX GROUP AT THE REPEATING UNIT THEREOF, WHEREIN X IS HYDROGEN, ALKALI METAL OR AMMONIUM, TO THE SYSTEM AT A TEMPERATURE LOWER THAN THE GELLING POINT OF GELATIN IN THE HARDENING PRETREATMENT OF THE COMPLEX COACERVATION UTILIZING GELATIN AT AT LEAST ONE OF THE HYDROPHILIC COLLOIDS, WHEREBY THE ELEVATION OF VISCOSITY DUE TO THE REACTION OF FELATIN AND AN ALDEHYDE HARDENING AGENT IS PREVENTED AND THE HARDENING PRETREATMENT CAN BE RAPIDLY CARRIED OUT.
Inventors
- 👤 H Matsukawa
- 👤 K Saeki
- 👤 S Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; B01J13/206; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |