US3677699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing anhydrous sodium dithionite
Assignee: Mitsui Toatsu Chemicals Inc
•
Filing: 1970-06-22
•
Granted: 1972-07-18
•
Expires: 1990-06-22
Abstract
Abstract A METHOD OF STABILIZING ANHYDROUS SODIUM DITHIONITE WHICH COMPRISES COATING PARTICLES OF ANHYDROUS SODIUM DITHIONITE WITH A THIN FILM OF OXYPROPYATED CELLULOSE OR OXYPROPYLATED STARCH.
Inventors
- 👤 Ryozo Fujiwara
- 👤 Eiji Ohara
- 👤 Kazuo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:37
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64; C01B17/66; C01B17/665
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |