Patent US3043740A successfully refreshed from Google Patents.
US3043740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the opacity of cellulose
Assignee: Framalite
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Filing: 1957-07-22
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Granted: 1962-07-10
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Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Herbert Manfred Freud D Frasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
METHOD OF IMPROVING THE OPACITY OF CELLULOSE, WHICH COMPRISES TREATING SUSPENDED CELLULOSE WITH AN AQUEOUS ALKALINE MEDIUM CONTAINING TIO2 FORMED OF ACID TITANIUM GEL WHICH HAS BEEN RENDERED ALKALINE BY ACTION OF SAID ALKALINE MEDIUM AND ALSO CONTAINING A COLLIOD WHICH IN SAID AQUEOUS ALKALINE MEDIUM HAS A NEGATIVE CHARGE.
Claim 2
Dependent Claim
50 words
METHOD OF IMPROVING THE OPACITY OF CELLULOSE, WHICH COMPRISES TREATING SUSPENDED CELLULOSE WITH AN AQUEOUS ALKALINE MEDIUM CONTAINING TIO2 FORMED OF ACID TITANIUM GEL WHICH HAS BEEN RENDERED ALKALINE BY ACTION OF SAID ALKALINE MEDIUM AND ALSO CONTAINING A COLLIOD WHICH IN SAID AQUEOUS ALKALINE MEDIUM HAS A NEGATIVE CHARGE.
References Cited (Backward Citations)
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Cited
US1692372A
Cited
US1959765A
Cited
US2121341A
Cited
GB520701A
Cited
US2345980A
Cited
US2576434A
Cited
US2563656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |