US2887429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing webs from cellulose esters
Assignee: Eastman Kodak Co
•
Filing: 1957-05-27
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Granted: 1959-05-19
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 William H Griggs
- 👤 Ralph D Zaffrann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:45
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/02; D21H13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD OF MAKING SHEETS ADAPTED TO BE FORMED INTO PRODUCTS WHICH COMPRISES FORMING A DILUTE SUSPENSION IN WATER OF A FIBROUS FLOCCULATED PRECIPITATE OF A LOWER FATTY ACID ESTER OF CELLULOSE AND 5-10% OF CELLULOSE ESTER STAPLE FIBER, LAYING DOWN THE SUSPENSION ONTO A FORAMINOUS SURFCE TO FORM A SHEET THEREFROM AND DRYING THE SO FORMED SHEET.
Claim 2
Independent Claim
58 words
A METHOD OF MAKING SHEETS ADAPTED TO BE FORMED INTO PRODUCTS WHICH COMPRISES FORMING A DILUTE SUSPENSION IN WATER OF A FIBROUS FLOCCULATED PRECIPITATE OF A LOWER FATTY ACID ESTER OF CELLULOSE AND 5-10% OF CELLULOSE ESTER STAPLE FIBER, LAYING DOWN THE SUSPENSION ONTO A FORAMINOUS SURFCE TO FORM A SHEET THEREFROM AND DRYING THE SO FORMED SHEET.
References Cited (Backward Citations)
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Cited
US2260343A
Cited
US2357962A
Cited
US2357392A
Cited
US2430868A
Cited
US2414833A
Cited
US2626214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |