US2622997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing insoluble coating from salts of carboxylic acids
Assignee: Scholtens Chemische Fabrieken NV
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Filing: 1948-05-28
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Granted: 1952-12-23
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Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 Lolkema Jan
- 👤 Beersma Pieter Johann Adrianus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:21
CPC Classifications
C; C09; C09D; C09D103/00; C09D103/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS OF PRODUCING INSOLUBLE COATINGS, COMPRISING ADDING BOTH A WATER SOLUBLE FERROUS SALT AND SODIUM HYDROSULPHITE IN AN AMOUNT TO INHIBIT THE OXIDATION OF THE FERROUS SALT DURING COATING TO AN AQUEOUS SOLUTION OF WATER SOLUBLE SALT OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF STARCH ETHER CARBOXYLIC ACIDS, STARCH ETER CARBOXYLIC ACIDS, CELLULOSE ETHER CARBOXYLIC ACIDS, CELLULOSE ESTER CARBOXYLIC ACIDS AND ALGINIC ACID TO FORM A WATER SOLUBLE COATING MIXTURE CONTAINING THE FERROUS SALT, APPLYING THE SOLUTION THUS OBTAINED TO THE SURFACE TO BE COATED AND SUBSEQUENTLY DRYING SAID COATED SURFACE IN CONTACT WITH THE AIR SO AS TO FORM THE INSOLUBLE FERRIC COMPOUND OF SAID SALT OF CARBOXYLIC ACID.
Claim 2
Dependent Claim
114 words
A PROCESS OF PRODUCING INSOLUBLE COATINGS, COMPRISING ADDING BOTH A WATER SOLUBLE FERROUS SALT AND SODIUM HYDROSULPHITE IN AN AMOUNT TO INHIBIT THE OXIDATION OF THE FERROUS SALT DURING COATING TO AN AQUEOUS SOLUTION OF WATER SOLUBLE SALT OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF STARCH ETHER CARBOXYLIC ACIDS, STARCH ETER CARBOXYLIC ACIDS, CELLULOSE ETHER CARBOXYLIC ACIDS, CELLULOSE ESTER CARBOXYLIC ACIDS AND ALGINIC ACID TO FORM A WATER SOLUBLE COATING MIXTURE CONTAINING THE FERROUS SALT, APPLYING THE SOLUTION THUS OBTAINED TO THE SURFACE TO BE COATED AND SUBSEQUENTLY DRYING SAID COATED SURFACE IN CONTACT WITH THE AIR SO AS TO FORM THE INSOLUBLE FERRIC COMPOUND OF SAID SALT OF CARBOXYLIC ACID.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |