Patent US2822157A successfully refreshed from Google Patents.
US2822157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for treating liquids
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1954-07-22
•
Granted: 1958-02-04
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 John L Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:45
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/14; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00078; B01J2219/00087; B01J2219/00094; B01J2219/00121; B01J2219/00159; B01J2219/00162
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US145538A
Cited
DE600807C
Cited
GB403082A
Cited
US2452260A
Cited
US2455498A
Cited
US2545028A
Cited
FR1040298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |