Patent US3449063A successfully refreshed from Google Patents.
US3449063A
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Method of controlling exhaust emission
Assignee: Ethyl Corp
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Filing: 1966-05-13
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Granted: 1969-06-10
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Expires: 1986-05-13
Abstract
No abstract record available.
Inventors
- 👤 Margaret E Griffing
- 👤 Frances W Lamb
- 👤 Ruth E Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01J; B01J23/00; B01J23/70; B01J23/72; B01J23/89; B01J23/8926; B01D2251/00; B01D2251/20; B01D2251/206; B01D2251/2062; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1023; B01D2255/20; B01D2255/207; B01D2255/20761; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |