Patent US4579779A successfully refreshed from Google Patents.
US4579779A
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Method of encapsulating volatile organic liquids
Assignee: Freund Corp
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Filing: 1983-09-30
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Granted: 1986-04-01
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Expires: 2003-09-30
Abstract
Abstract A method of encapsulating organic liquids for controlled volatilization and release is described, which comprises in one embodiment charging a fine silica into a mixing container which does not inflict shearing force to the contents and adding the liquid (having a viscosity of 50 centipoise or less at 25° C.) onto and mixing with the fine silica in the mixing container.
Inventors
- 👤 Shigeru Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:37
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/18; A01N25/26; A01N25/28; B; B01; B01J; B01J13/00; B01J13/02; B01J13/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A method of encapsulating a volatile organic liquid having a viscosity of 50 centipoise or less at 25° C., with particles of amorphous silica, which comprises; providing particles of said silica in a mixing vessel; adding said liquid to the particles; and mixing the silica and the liquid under non-shearing conditions; said silica having an average particle size of less than 300 micron and a micropore distribution characterized by 50% of the integrated volume of said micropore being distributed to the micropores having a radius of up to 1000 Angstroms.
Claim 2
Independent Claim
90 words
A method of encapsulating a volatile organic liquid having a viscosity of 50 centipoise or less at 25° C., with particles of amorphous silica, which comprises; providing particles of said silica in a mixing vessel; adding said liquid to the particles; and mixing the silica and the liquid under non-shearing conditions; said silica having an average particle size of less than 300 micron and a micropore distribution characterized by 50% of the integrated volume of said micropore being distributed to the micropores having a radius of up to 1000 Angstroms.
Claim 3
Dependent Claim
8 words
The product of the method of claim 1.
References Cited (Backward Citations)
US3393155A
Cited
US4268411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |