US2989144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for purifying and decontaminating exhaust gases of combustion devices
Assignee: Individual
•
Filing: 1956-12-27
•
Granted: 1961-06-20
•
Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Styrie Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:19
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/01; F01N3/08; F01N3/0892; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S422/00; Y10S422/907; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1430294A
Cited
US1756897A
Cited
US2005249A
Cited
US1934596A
Cited
US2195431A
Cited
FR1076860A
Cited
US2746563A
Cited
US2798572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |