Patent US4045553A successfully refreshed from Google Patents.
US4045553A
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Method of treating silver impregnated activated carbon
Assignee: Nippon Shinyaku Co Ltd
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Filing: 1975-02-26
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Granted: 1977-08-30
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Expires: 1995-02-26
Abstract
Abstract The known sterilization and purification properties of activated carbon which is impregnated with silver are restored by treating spent silver impregnated activated carbon with steam.
Inventors
- 👤 Nobuo Mitsumori
- 👤 Chikahiro Takeda
- 👤 Hideichi Miyasako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; C02F1/505; A; A61; A61L; A61L2/00; A61L2/16; A61L2/23; A61L2/238; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/342; C01B32/348; C01B32/354; C01B32/36; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
The method of restoring the sterilization and purification properties of silver impregnated activated carbon which comprises subjecting spent silver impregnated activated carbon to the action of steam until said properties are restored.
Claim 2
Independent Claim
32 words
The method of restoring the sterilization and purification properties of silver impregnated activated carbon which comprises subjecting spent silver impregnated activated carbon to the action of steam until said properties are restored.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |