Patent US2828831A successfully refreshed from Google Patents.
US2828831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cleaner
Assignee: Motors Liquidation Co
•
Filing: 1953-11-02
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Granted: 1958-04-01
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Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 Napoleon P Boretti
- 👤 Ernest V Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0012; B01D46/42; B01D46/48; B01D50/00; B01D50/20
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |