Patent US2955280A successfully refreshed from Google Patents.
Patent US2806256A successfully refreshed from Google Patents.
US2806256A
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Method of making microporous film
Assignee: S-J Chemical Co
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Filing: 1954-06-25
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Granted: 1957-09-17
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/003; B29; B29C; B29C67/00; B29C67/20; B29C67/202; C; C08; C08J; C08J9/00; C08J9/26; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; D06M15/233; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/409; H01M50/411; H01M50/414; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S521/00; Y10S521/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF MAKING MICROPOROUS FILMS WHICH COMPRISES MIXING FINELY DIVIDED THERMOPLASTIC PARTICLES WITH A WATER DISPERSION OF AN INCOMPATIBLE INERT MATRIX MEDIUM, HEATING THE MIXTURE TO AT LEAST PARTIALLY DRY THE MIXTURE, FURTHER HEATING THE MIXTURE TO A TEMPERATURE SUFFICIENT TO FUSE THE THERMOPLASTIC PARTICLES, SAID MATRIX MEDIUM BEING IN A CONTINUOUS VISCOUS PHASE AT THE TEMPERATURE USED TO CAUSE FUSION OF THE THERMOPLASTIC PARTICLES, AND THEN EXTRACTING THE MATRIX MEDIUM.
Claim 2
Independent Claim
72 words
THE METHOD OF MAKING MICROPOROUS FILMS WHICH COMPRISES MIXING FINELY DIVIDED THERMOPLASTIC PARTICLES WITH A WATER DISPERSION OF AN INCOMPATIBLE INERT MATRIX MEDIUM, HEATING THE MIXTURE TO AT LEAST PARTIALLY DRY THE MIXTURE, FURTHER HEATING THE MIXTURE TO A TEMPERATURE SUFFICIENT TO FUSE THE THERMOPLASTIC PARTICLES, SAID MATRIX MEDIUM BEING IN A CONTINUOUS VISCOUS PHASE AT THE TEMPERATURE USED TO CAUSE FUSION OF THE THERMOPLASTIC PARTICLES, AND THEN EXTRACTING THE MATRIX MEDIUM.
References Cited (Backward Citations)
US2644802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |