Patent US2355088A successfully refreshed from Google Patents.
US3476508A
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Catalytic purification treatment of exhaust gas
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-10-27
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Granted: 1969-11-04
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Expires: 1985-10-27
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
- 👤 Robert J Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2912300A
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US3316057A
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US3025133A
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US3181928A
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US3053612A
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US3177152A
Cited
US3346328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |