US2807930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of exhaust gases
Assignee: Oxy Catalyst Inc
•
Filing: 1955-02-23
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Granted: 1957-10-01
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Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred I Bratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:10
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; F01N13/00; F01N13/14; F01N3/18; F01N3/20; F01N3/2006; F01N3/2033; F01N3/22; F01N3/30; F01N3/32; F01N3/38; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |