US2618580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a porous organic film
Assignee: Lamitex Products Inc
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Filing: 1949-01-18
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Granted: 1952-11-18
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Expires: 1969-01-18
Abstract
No abstract record available.
Inventors
- 👤 Talbot A Lancaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:52
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS OF PREPARING A POROUS ORGANIC FILM WHICH COMPRISES APPLYING A SUSPENSION OF AN ORGANIC FILM-FORMING MATERIAL TO A MOVING SURFACE; TRANSFERRING THE SAID SUSPENSION FROM SAID MOVING SURFACE TO A SECOND SURFACE, MOVING IN A DIRECTION OPPOSITE TO SAID FIRST SURFACE, BY PRESSURE EXERTED BETWEEN THE SAID TWO MOVING SURFACES, THE LINEAR SPEED OF MOVEMENT OF SAID SECOND-MOVING SURFACE BEING GREATER THAN THE LINEAR SPEED OF MOVEMENT OF SAID FIRST-MOVING SURFACE; AND THEREAFTER SUBJECTING THE PASTY SHEET
Claim 2
Dependent Claim
79 words
THE PROCESS OF PREPARING A POROUS ORGANIC FILM WHICH COMPRISES APPLYING A SUSPENSION OF AN ORGANIC FILM-FORMING MATERIAL TO A MOVING SURFACE; TRANSFERRING THE SAID SUSPENSION FROM SAID MOVING SURFACE TO A SECOND SURFACE, MOVING IN A DIRECTION OPPOSITE TO SAID FIRST SURFACE, BY PRESSURE EXERTED BETWEEN THE SAID TWO MOVING SURFACES, THE LINEAR SPEED OF MOVEMENT OF SAID SECOND-MOVING SURFACE BEING GREATER THAN THE LINEAR SPEED OF MOVEMENT OF SAID FIRST-MOVING SURFACE; AND THEREAFTER SUBJECTING THE PASTY SHEET
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |