US3519573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-oxygen activation of nickel-molybdenum catalysts
Assignee: Shell USA Inc
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Filing: 1967-05-11
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Granted: 1970-07-07
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Expires: 1987-05-11
Abstract
No abstract record available.
Inventors
- 👤 Richard H Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12; B; B01; B01J; B01J21/00; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/883; B01J23/90; B01J23/94; B01J37/00; B01J37/20; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 0
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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) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |