US3148155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal poisons from catalysts
Assignee: ExxonMobil Oil Corp
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Filing: 1959-12-29
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Granted: 1964-09-08
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Expires: 1979-12-29
Abstract
No abstract record available.
Inventors
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:38
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
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
Claim 2
Independent Claim
172 words
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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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |