Patent US3009831A successfully refreshed from Google Patents.
US3009831A
Expired / Lapsed
US
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Impregnated films of regenerated cellulose
Assignee: BASF SE
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Filing: 1959-02-09
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Granted: 1961-11-21
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Expires: 1979-02-09
Abstract
No abstract record available.
Inventors
- 👤 Wilfinger Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J2301/00; C08J2301/06; C08J2477/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31891; Y10T428/31971
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
AN ARTICLE OF MANUFACTURE COMPRISES A REGENERATED CELLULOSE FILM WHICH IS IMPREGNATED WITH A REACTION PRODUCT OF A 1,2-ALKYLENE IMINE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYLATING AGENT HAVING FROM 4 TO 22 CARBON ATOMS IN THE ALKYL RADICAL AND AN ACYLATING AGENT HAVING FROM 4 TO 22 CARBON ATOMS IN THE ACYL RADICAL REACTED AT A MOL RATIO IN THE RANGE OF BETWEEN 4 AND 100 MOLS OF SAID 1,2-ALKYLENE IMINE TO ONE MOL OF SAID MEMBER, SAID IMPREGNATED CELLULOSE FILM BEING COATED WITH A HYDROPHOBIC, MOISTUREPROOF COATING OF A HIGH MOLECULAR WEIGHT COATING COMPOSITION.
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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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |