Patent US2798544A successfully refreshed from Google Patents.
US2798544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for producing high density detergents
Assignee: Purex Corp Ltd
•
Filing: 1952-02-28
•
Granted: 1957-07-09
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Davis Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:54
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16; B01D1/18; C; C11; C11D; C11D11/00; C11D11/02; Y; Y10; Y10S; Y10S159/00; Y10S159/14; Y10S159/31
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE19456E
Cited
US2100277A
Cited
US2230196A
Cited
US2559989A
Cited
US2435424A
Cited
US2570213A
Cited
US2581081A
Cited
US2636555A
Cited
US2576297A
Cited
US2576264A
Cited
US2606156A
Cited
US2566229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |