US3361528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of orthophosphorous acid
Assignee: Monsanto Co
•
Filing: 1964-09-08
•
Granted: 1968-01-02
•
Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Shen Chung Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/906; Y10S210/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |