US2623244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drying films
Assignee: —
•
Filing: —
•
Granted: 1952-12-30
•
Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:39
CPC Classifications
B; B29; B29D; B29D7/00; B29C; B29C71/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
THE METHOD OF PRODUCING FILMS OF REGENERATED CELLULOSE WHICH COMPRISES SIMULTANEOUSLY EXTRUDING A PLURALITY OF FILMS INTO THE SAME COAGULATING BATH, SUPERIMPOSING THE COAGLATED FILMS, SUBJECTING THE SUPERIMPOSED FILMS TO FINISHING TREATMENTS, MOMENTARILY SEPARATING THE WET TREATED FILMS, TREATING THE INDIVIDUAL FILMS WHILE THUS SEPARATED WITH A SUBSTANCE CAPABLE OF PREVENTING ADHERENCE BETWEEN THE DRIED FILMS AND SELECTED FROM THE CLASS CONSISTING OF ALKALINE SILICATES, ALKALINE CARBONATES, ALKALINE BICARBONATES, ALKALINE OXALATES, ALKALINE ALUMINATES AND INSOLUBLE ORGANIC AMIDES, SUPERIMPOSING THE WET TREATED FILMS, PASSING THE SUPERIMPOSED FILMS THROUGH A DRYING ZONE FOR DRYING AND SEPARATING THE DRIED FILMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |