US3784488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and compositions for preparing unique films having a multiplicity of voids and an organic material contained therein
Assignee: DowBrands Inc
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Filing: 1972-02-14
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Granted: 1974-01-08
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Expires: 1992-02-14
Abstract
Abstract NOVEL FILM FORMING SOLUTION COMPOSITIONS WHICH CONTAIN A HIGH LEVEL OF A NON-VOLATILE LIQUID ORGANIC COMPOUND IN PROPORTION TO THE FILM FORMING POLYMER ARE CAPABLE OF FORMING UNIQUE COHERENT FILMS HAVING A MULTIPLICITY OF VOIDS WHICH CONTAIN THEREIN THE ORGANIC COMPOUND. IMPORTANT TO OBTAINING THE UNIQUE FILMS OF THE INVENTION IS THE REQUIREMENT THAT THE POLYMER BE INSOLUBLE IN THE ORGANIC COMPOUND AND IMMISCIBLE THEREWITH AND BE MORE SOLUBLE IN THE SOLVENT THAN THE ORGANIC COMPOUND.
Inventors
- 👤 A Steinhauer
- 👤 O Mcintire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:09
CPC Classifications
A; A61; A61Q; A61Q13/00; A61K; A61K8/00; A61K8/02; A61K8/18; A61K8/30; A61K8/33; A61K8/36; A61K8/368; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; A61Q17/00; A61Q17/04
Claims Analysis
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |