Patent US3592944A successfully refreshed from Google Patents.
US3592944A
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Borohydride-sulfite reducing agent for dyeing
Assignee: Ventron Corp
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Filing: 1968-05-06
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Granted: 1971-07-13
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Expires: 1988-05-06
Abstract
Abstract A METHOD FOR PRODUCING USEFUL SOLUTIONS FOR REDUCING DYES WITH THE AID OF BOROGHYRIDES IS CHARACTERIZED BY REACTING A SOLUTION OF ALKALI METAL BOROHYDRIDES WITH SOLUTIONS OF SODIUM SALTS OF SULFUR AND THEN REACTING THIS WITH ABOUT 1 MOL OF CH2O PER MOLE OF NA2S2O4, WHEREUPON THE SOLUTION IS MIXED WITH FURTHER BOROGYDRIDES.
Inventors
- 👤 Dieter Rudolf Goerrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:50
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/221
Claims Analysis
Total Claims: 0
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |