US2542052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvalent metal pectinate films and process of producing same
Assignee: Individual
•
Filing: 1947-06-10
•
Granted: 1951-02-20
•
Expires: 1967-06-10
Abstract
No abstract record available.
Inventors
- 👤 Harry S Owens
- 👤 Thomas H Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:44
CPC Classifications
C; C08; C08L; C08L5/00; C08L5/06; C08J; C08J5/00; C08J5/18; C08J2305/00; C08J2305/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS OF PRODUCING A FILM COMPRISING PECTINIC ACID HAVING A METHOXYL CONTENT NOT GREATER THAN 7.4% WITH AN INORGANIC HYDROXIDE AT LEAST PARTIALLY TO NEUTRALIZE THE PECINTIC ACID, FORMING A FILM OF THE MATERIAL THUS OBTAINED, AND CONTACTING THE FILM WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE POLYVALENT METAL SALT.
Claim 2
Dependent Claim
51 words
A PROCESS OF PRODUCING A FILM COMPRISING PECTINIC ACID HAVING A METHOXYL CONTENT NOT GREATER THAN 7.4% WITH AN INORGANIC HYDROXIDE AT LEAST PARTIALLY TO NEUTRALIZE THE PECINTIC ACID, FORMING A FILM OF THE MATERIAL THUS OBTAINED, AND CONTACTING THE FILM WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE POLYVALENT METAL SALT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |