US3979329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon molecular sieve catalyst
Assignee: Johnson Matthey PLC
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Filing: 1974-02-19
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Granted: 1976-09-07
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Expires: 1994-02-19
Abstract
Abstract A method of preparing a selective catalyst which includes the steps of polymerizing furfuryl alcohol in an acidic solution of a platinum salt, curing the polymer and carbonizing the same, the curing and carbonizing being carried out in an inert atmosphere.
Inventors
- 👤 Barry John Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:55
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/18; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J37/00; B01J37/0009; B01J37/0018; C; C07; C07C; C07C2521/00; C07C2521/18; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/42; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/513
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A method of preparing a selective catalyst which includes the steps of treating furfuryl alcohol with an aqueous solution of chloroplatinic acid, warming the mixture to initiate polymerisation of the alcohol, drying the polymer by heating under nitrogen, curing the polymer by heating to 200°C for 16 hours and carbonising the polymer by heating to 650°C for four hours, both the curing and carbonising steps being carried out under nitrogen.
Claim 2
Independent Claim
70 words
A method of preparing a selective catalyst which includes the steps of treating furfuryl alcohol with an aqueous solution of chloroplatinic acid, warming the mixture to initiate polymerisation of the alcohol, drying the polymer by heating under nitrogen, curing the polymer by heating to 200°C for 16 hours and carbonising the polymer by heating to 650°C for four hours, both the curing and carbonising steps being carried out under nitrogen.
Claim 3
Independent Claim
45 words
A method of preparing a selective catalyst which includes the steps of heating furfuryl alcohol in an aqueous solution of chloroplatinic acid to polymerise said furfuryl alcohol, curing the polymer and carbonising the same, the curing and carbonising being carried out in an inert atmosphere.
Claim 4
Independent Claim
45 words
A method of preparing a selective catalyst which includes the steps of heating furfuryl alcohol in an aqueous solution of chloroplatinic acid to polymerise said furfuryl alcohol, curing the polymer and carbonising the same, the curing and carbonising being carried out in an inert atmosphere.
References Cited (Backward Citations)
CA660296A
Cited
GB932387A
Cited
US3446865A
Cited
GB1147563A
Cited
GB1138307A
Cited
US3793354A
Cited
US3617481A
Cited
US3793224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |