US2940871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method of making microporous products
Assignee: S-J Chemical Co
•
Filing: 1955-08-05
•
Granted: 1960-06-14
•
Expires: 1975-08-05
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:28
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; B29C67/202; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/37; D06M15/39; D06M23/00; D06M23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF MAKING MICROPOROUS COMPOSITION AND FILMS WHICH COMPRISES DISPERSING FINELY DIVIDED THERMOPLASTIC RESINOUS PARTICLES THROUGHOUT AN INERT, INCOMPATIBLE MATRIX MEDIUM, HEATING THE DISPERSION TO A TEMPERATURE SUFFICIENT TO FUSE THE THERMOPLASTIC PARTICLES, SAID MATRIX MEDIUM COMPRISING AT LEAST TWO MUTUALLY INCOMPATIBLE AND INERT COMPONENTS WHICH ARE EACH MUTUALLY INCOMPATIBLE AND INERT WITH THE THERMOPLASTIC PARTICLES AT THE TEMPERATURE USED TO FUSE THE THERMOPLASTIC PARTICLES AND WHICH ARE IN A LIQUID STATE AT THE TEMPERATURE USED TO FUSE THE THERMOPLASTIC PARTICLES, AND THEN EXTRACTING THE MATRIX MEDIUM.
Claim 2
Dependent Claim
20 words
THE METHOD OF CLAIM 9 IN WHICH THE DISPERSION IS APPLIED TO A BACKING MATERIAL BEFORE BEING SUBJECTED TO HEAT.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |