Patent US3111425A successfully refreshed from Google Patents.
US3111425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating regenerated cellulose
Assignee: —
•
Filing: —
•
Granted: 1963-11-19
•
Expires: 1980-11-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
B; B32; B32B; B32B23/00; B32B23/04; B32B23/08; C; C08; C08J; C08J5/00; C08J5/18; B32B27/00; B32B27/06; C08J7/00; C08J7/04; C08J7/0427; C08J2301/00; C08J2301/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR IMPROVING THE PROPERTIES OF REGENERATED CELLULOSE FILM WHEREIN THE REGENERATED CELLULOSE FILM IS CAST, PURIFIED, SOFTENED, DRIED AND COATED WITH A COALESCIBLE FILM-FORMING MATERIAL FROM AN AQUEOUS DISPERSION OF SAID MATERIAL AND THE COATING IS THEN SMOOTHED AND DRIED, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID FILM IN THE FORM OF A WET GEL AFTER PURIFICATION BUT PRIOR TO THE FIRST DRYING STEP AN AQUEOUS ALKALINE MEDIUM CONTAINING A WATER-SOLUBLE SALT OF A SUBSTITUTED POLYMERIZATION PRODUCT OF STYRENE AND MALEIC ACID CONTAINING ABOUT 50 MOLE PERCENT OF STYRENE IN THE POLYMER MOLECULE, SAID POLYMERIZATION PRODUCT COMPOSED OF "XN" UNITS OF
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR IMPROVING THE PROPERTIES OF REGENERATED CELLULOSE FILM WHEREIN THE REGENERATED CELLULOSE FILM IS CAST, PURIFIED, SOFTENED, DRIED AND COATED WITH A COALESCIBLE FILM-FORMING MATERIAL FROM AN AQUEOUS DISPERSION OF SAID MATERIAL AND THE COATING IS THEN SMOOTHED AND DRIED, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID FILM IN THE FORM OF A WET GEL AFTER PURIFICATION BUT PRIOR TO THE FIRST DRYING STEP AN AQUEOUS ALKALINE MEDIUM CONTAINING A WATER-SOLUBLE SALT OF A SUBSTITUTED POLYMERIZATION PRODUCT OF STYRENE AND MALEIC ACID CONTAINING ABOUT 50 MOLE PERCENT OF STYRENE IN THE POLYMER MOLECULE, SAID POLYMERIZATION PRODUCT COMPOSED OF "XN" UNITS OF
References Cited (Backward Citations)
CA554877A
Cited
US2469407A
Cited
US2650172A
Cited
US2597625A
Cited
US2691609A
Cited
US2697672A
Cited
US2909449A
Cited
US2996405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |