US2770053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing pellicles, films, and sheets
Assignee: Akzo Nobel UK PLC
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Filing: 1956-07-13
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Granted: 1956-11-13
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 Charles M Rosser
- 👤 Brillhart William Oldham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
B; B29; B29D; B29D7/00; B29C; B29C71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR DRYING PELLICIES WHICH COMPRISES THE STEPS OF POSITIONING A PLURALITY OF WET GEL PELLICLES IN FACE-TO-FACE CONTACT, PASSING SAID CONTACTING PELLICLES INTO A DRYING STAGE, SEPARATING SAID PELLICLES DURING SAID DRYING STAGE BEFORE THE MOISTURE CONTENT THEREOF HAS BEEN REDUCED TO 30% BY WEIGHT, TREATING THE OPPOSED SURFACES OF SAID PELLICLE DURING SUCH SEPARATION WITH AN AQUEOUS LIQUID MEDIUM, RESTORING SAID PELLICLES INTO FACE-TO-FACE CONTACT AND CONTINUING PASSAGE OF THE SAME THROUGH SAID DRYING STAGE, SEPARATING SAID PELLICLES AFTER THE MOISTURE CONTENT THEREOF IS LESS THAN 30% BY WEIGHT, AND COMPLETING THE DRYING THEREOF.
Claim 2
Dependent Claim
97 words
A PROCESS FOR DRYING PELLICIES WHICH COMPRISES THE STEPS OF POSITIONING A PLURALITY OF WET GEL PELLICLES IN FACE-TO-FACE CONTACT, PASSING SAID CONTACTING PELLICLES INTO A DRYING STAGE, SEPARATING SAID PELLICLES DURING SAID DRYING STAGE BEFORE THE MOISTURE CONTENT THEREOF HAS BEEN REDUCED TO 30% BY WEIGHT, TREATING THE OPPOSED SURFACES OF SAID PELLICLE DURING SUCH SEPARATION WITH AN AQUEOUS LIQUID MEDIUM, RESTORING SAID PELLICLES INTO FACE-TO-FACE CONTACT AND CONTINUING PASSAGE OF THE SAME THROUGH SAID DRYING STAGE, SEPARATING SAID PELLICLES AFTER THE MOISTURE CONTENT THEREOF IS LESS THAN 30% BY WEIGHT, AND COMPLETING THE DRYING THEREOF.
References Cited (Backward Citations)
US1975708A
Cited
US2622340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |