Patent US4496786A successfully refreshed from Google Patents.
US4496786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective conversion of methanol to low molecular weight olefins over high silica SSZ-13 zeolite
Assignee: Chevron USA Inc
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Filing: 1983-09-30
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Granted: 1985-01-29
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Expires: 2003-09-30
Abstract
Abstract A process for the conversion of methanol to olefins by contacting an methanol-containing feedstock with an SSZ-13 under methanol conversion conditions.
Inventors
- 👤 Donald S. Santilli
- 👤 Stacey I. Zones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:36
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
The process of converting methanol to olefins comprising contacting a methanol feedstock with SSZ-13 zeolite having an SiO 2 /Al 2 O 3 ratio by weight greater than about 20 under methanol conversion conditions.
Claim 2
Dependent Claim
34 words
The process of converting methanol to olefins comprising contacting a methanol feedstock with SSZ-13 zeolite having an SiO 2 /Al 2 O 3 ratio by weight greater than about 20 under methanol conversion conditions.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the SiO 2 /Al 2 O 3 ratio by weight is greater than about 30.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the SiO 2 /Al 2 O 3 ratio by weight is greater than about 40.
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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |