US2600504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming paper from modified calcium alginate fibers
Assignee: Alginate Industries Ltd
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Filing: 1948-06-04
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Granted: 1952-06-17
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Expires: 1968-06-04
Abstract
No abstract record available.
Inventors
- 👤 Johnson Arthur
- 👤 Millatt Edwin George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:36
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/28; D21H13/30; D21H13/32; D21H5/00; D21H5/12; D21H5/1227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF MAKING PAPER WHICH CONSISTS IN TAKING WATER-INSOLUBLE ALKALINE-EARTH ALGINATE FIBRES, REDUCING THEM TO THE FORM OF A SHORTFIBRE AQUEOUS PULP, INTRODUCING A SOLUBLE ALKALI SALT OF AN ANION WHICH WILL FORM AN INSOLUBLE SALT WITH THE ALKALINE EARTH IN THE INSOLUBLE ALGINATE FIBRES, IN SUFFICIENT QUANTITY TO COMBINE WITH FROM 15% TO 55% OF THE ALKALINE EARTH, THUS CAUSING THE FIBRES TO SWELL, AND THEN CAUSING THE FIBRES TO FELT TOGETHER TO MAKE PAPER.
Claim 2
Dependent Claim
77 words
A PROCESS OF MAKING PAPER WHICH CONSISTS IN TAKING WATER-INSOLUBLE ALKALINE-EARTH ALGINATE FIBRES, REDUCING THEM TO THE FORM OF A SHORTFIBRE AQUEOUS PULP, INTRODUCING A SOLUBLE ALKALI SALT OF AN ANION WHICH WILL FORM AN INSOLUBLE SALT WITH THE ALKALINE EARTH IN THE INSOLUBLE ALGINATE FIBRES, IN SUFFICIENT QUANTITY TO COMBINE WITH FROM 15% TO 55% OF THE ALKALINE EARTH, THUS CAUSING THE FIBRES TO SWELL, AND THEN CAUSING THE FIBRES TO FELT TOGETHER TO MAKE PAPER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |