US3531664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for and method of removing pollutants from products of combustion
Assignee: Avco Corp
•
Filing: 1968-11-07
•
Granted: 1970-09-29
•
Expires: 1988-11-07
Abstract
No abstract record available.
Inventors
- 👤 Finn A Hals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; H; H02; H02K; H02K44/00; H02K44/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3379903A
Cited
US3471723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |