US2880236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of starch-bisulphite addition products
Assignee: Individual
•
Filing: 1956-11-20
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Granted: 1959-03-31
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Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Charles L Mehltretter
- 👤 John W Van Cleve
- 👤 Paul R Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:36
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18; C08B31/185; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR PREPARING WATER-SOLUBLE DIALDEHYDE STARCH-BISULPHITE ADDITION PRODUCTS WHICH COMPRISE INTIMATELY CONTACTING DIALDEHYDE STARCH WITH AN AQUEOUS SOLUTION OF AN INORGANIC COMPOUND YIELDING BISULPHITE IONS.
Claim 2
Dependent Claim
26 words
A PROCESS FOR PREPARING WATER-SOLUBLE DIALDEHYDE STARCH-BISULPHITE ADDITION PRODUCTS WHICH COMPRISE INTIMATELY CONTACTING DIALDEHYDE STARCH WITH AN AQUEOUS SOLUTION OF AN INORGANIC COMPOUND YIELDING BISULPHITE IONS.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |