Patent US3409409A successfully refreshed from Google Patents.
US3409409A
Expired / Lapsed
US
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Controlled ph scrubber system
Assignee: Individual
•
Filing: 1966-04-22
•
Granted: 1968-11-05
•
Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Sr Walter J Sackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/027; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 0
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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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |