US4452861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid particles encapsulated with cyanoacrylate polymer
Assignee: RCA Corp
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Filing: 1982-05-20
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Granted: 1984-06-05
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Expires: 2002-05-20
Abstract
Abstract Article of manufacture comprises a solid core particle individually encapsulated with a film consisting essentially of alkyl 2-cyanoacrylate polymeric material. The film may be produced in situ by agitating a mixture of core particles having adsorbed water on the surfaces thereof in a nonaqueous liquid containing dissolved alkyl 2-cyanoacrylate monomer, whereby the monomer and adsorbed water react and deposit the film on the surfaces of the particles.
Inventors
- 👤 Fumio Okamoto
- 👤 Katsuhiro Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/29; Y10T428/2982; Y10T428/2989; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
An article of manufacture comprising solid core particles of water-sensitive inorganic phosphor, each particle being separately encapsulated with a film coating consisting essentially of alkyl 2-cyanoacrylate polymer, said film coatings providing said particles with substantial protection from deterioration when they are present in an aqueous slurry.
Claim 2
Dependent Claim
46 words
An article of manufacture comprising solid core particles of water-sensitive inorganic phosphor, each particle being separately encapsulated with a film coating consisting essentially of alkyl 2-cyanoacrylate polymer, said film coatings providing said particles with substantial protection from deterioration when they are present in an aqueous slurry.
Claim 3
Dependent Claim
16 words
The article of manufacture defined in claim 1 wherein said films have been polymerized in situ.
Claim 4
Dependent Claim
16 words
The article of manufacture defined in claim 1 wherein said films consist essentially of poly(ethyl 2-cyanoacrylate).
Claim 5
Dependent Claim
35 words
The article of manufacture defined in claim 1 wherein said core particles are solid particles of luminescent material consisting essentially of activated host crystals selected from the group consisting of CaS, SrS and (Ca, Sr)S.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |