Patent US3398513A successfully refreshed from Google Patents.
US3398513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scrubber apparatus
Assignee: Individual
•
Filing: 1967-01-09
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Granted: 1968-08-27
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Expires: 1987-01-09
Abstract
No abstract record available.
Inventors
- 👤 David L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:18
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/04; B01D47/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1780156A
Cited
US1878052A
Cited
US2220706A
Cited
US2418381A
Cited
US2664911A
Cited
US3201919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |