US2852239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating gases
Assignee: Individual
•
Filing: 1953-01-28
•
Granted: 1958-09-16
•
Expires: 1973-01-28
Abstract
No abstract record available.
Inventors
- 👤 Vicard Pierre Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:21
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US984279A
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US1175462A
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US2020325A
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US2066832A
Cited
GB536116A
Cited
US2376298A
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US2579282A
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US2667340A
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US2632523A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |