US2498832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for classifying and separating suspended particles from gases
Assignee: Aerotec Corp
•
Filing: 1946-05-13
•
Granted: 1950-02-28
•
Expires: 1966-05-13
Abstract
No abstract record available.
Inventors
- 👤 John E Watson
- 👤 Charles B Mcbride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/14; B04C5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US216740A
Cited
US472682A
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US1897144A
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US739231A
Cited
US1624518A
Cited
US2102525A
Cited
US2360355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |