US2952358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of potash ores
Assignee: Potash Corp of Saskatchewan Inc
•
Filing: 1953-05-07
•
Granted: 1960-09-13
•
Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Edmund A Schoeld
- 👤 Fritschy John Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:31
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D2201/00; B03D2201/007; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2105295A
Cited
US2211396A
Cited
US2095546A
Cited
US2188933A
Cited
US2346320A
Cited
US2288497A
Cited
US2322789A
Cited
US2365805A
Cited
US2696912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |