US4617035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas adsorbent and process for producing same
Assignee: Taiyo Nippon Sanso Corp
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Filing: 1984-11-28
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Granted: 1986-10-14
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Expires: 2004-11-28
Abstract
Abstract Gas adsorbent and process for producing same. A zeolitic or silica-alumina adsorbent is heat treated in a carbon atom-containing gas or a gaseous mixture consisting of a carbon atom-containing gas and an inorganic gas at 100 DEG to 700 DEG C. to produce the gas adsorbent. The gas adsorbent has carbon particles ranging in size from about 0.01 to about 10 mu m adhering on the surface or in pores thereof.
Inventors
- 👤 Akira Wakaizumi
- 👤 Hiroshi Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A gas adsorbent comprising either a zeolitic or silica-alumina adsorbent which has carbon particles ranging in size from about 0.01 to about 10 μm adhering on the surface and in pores thereof, said gas adsorbent being produced by heat-treating said adsorbent in a carbon-atom containing gas or a gaseous mixture consisting of a carbon-atom containing gas and an inorganic gas at a temperature of 100° C. to 700° C.
Claim 2
Dependent Claim
69 words
A gas adsorbent comprising either a zeolitic or silica-alumina adsorbent which has carbon particles ranging in size from about 0.01 to about 10 μm adhering on the surface and in pores thereof, said gas adsorbent being produced by heat-treating said adsorbent in a carbon-atom containing gas or a gaseous mixture consisting of a carbon-atom containing gas and an inorganic gas at a temperature of 100° C. to 700° C.
Claim 3
Dependent Claim
63 words
A process for producing a gas adsorbent which comprises heat-treating a zeolitic or silica-alumina adsorbent in a carbon-atom containing gas or a gaseous mixture consisting of a carbon-atom containing gas and an inorganic gas at 100° C. to 700° C., whereby carbon particles ranging in size from about 0.01 to about 10 μm adheres on the surface and in pores of the adsorbent.
Claim 4
Dependent Claim
63 words
A process for producing a gas adsorbent which comprises heat-treating a zeolitic or silica-alumina adsorbent in a carbon-atom containing gas or a gaseous mixture consisting of a carbon-atom containing gas and an inorganic gas at 100° C. to 700° C., whereby carbon particles ranging in size from about 0.01 to about 10 μm adheres on the surface and in pores of the adsorbent.
Claim 5
Dependent Claim
36 words
A process according to claim 2 in which said carbon-atom containing gas is at least one selected from the group consisting of carbon monoxide, aromatic hydrocarbons, paraffinic hydrocarbon, olefinic hydrocarbons, acetylenic hydrocarbons, alcohols, and mixtures thereof.
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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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |