US2744737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for smoke abatement and by-products recovery
Assignee: Individual
•
Filing: 1952-12-17
•
Granted: 1956-05-08
•
Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 John Van Vliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:07
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; B01D47/08; B01D47/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |