US2529045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning stack gas
Assignee: Whiting Corp
•
Filing: 1947-02-03
•
Granted: 1950-11-07
•
Expires: 1967-02-03
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Ortgies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/18; B; B01; B01D; B01D47/00; B01D47/06; F23; F23J; F23J11/00; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S261/54; Y10S55/00; Y10S55/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US274867A
Cited
US419530A
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GB190623991A
Cited
US1017394A
Cited
US1752506A
Cited
US1966859A
Cited
US2088124A
Cited
US2186125A
Cited
US2387345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |