US3353909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stabilized alkali metal dithionates
Assignee: BASF SE
•
Filing: 1963-12-17
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Granted: 1967-11-21
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Expires: 1983-12-17
Abstract
No abstract record available.
Inventors
- 👤 Janson Alfons
- 👤 Poschmann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64; C01B17/66; C01B17/665
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A ESSENTIALLY ANHYDROUS MIXTURE OF FINELY-DIVIDED, ESSENTIALLY DRY, ALKALI METAL DITHIONITE AND, AS A STABILIZER AGAINST SELF IGNITION OF SAID DITHIONITE, 2-20% BY WEIGHT, BASED ON SAID DITHIONITE, OF UREA.
Claim 2
Dependent Claim
30 words
A ESSENTIALLY ANHYDROUS MIXTURE OF FINELY-DIVIDED, ESSENTIALLY DRY, ALKALI METAL DITHIONITE AND, AS A STABILIZER AGAINST SELF IGNITION OF SAID DITHIONITE, 2-20% BY WEIGHT, BASED ON SAID DITHIONITE, OF UREA.
References Cited (Backward Citations)
GB786212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |