US4714482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film polymer blend membranes
Assignee: EMS SECTOR HOLDINGS Inc
•
Filing: 1985-07-11
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Granted: 1987-12-22
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Expires: 2005-07-11
Abstract
Abstract Thin film polymer blend membranes which may be used for the separation of gases will consist of a blend of an inorganic compound such as phosphoric acid, sulfuric acid, heteropoly acids or salts of heteropoly acids, an organic polymer such as poly(vinyl alcohol) and a poly organic acid such as poly(acrylic acid), poly(methacrylic acid) or poly(styrene sulfonic acid). The thin film membrane composites may be used as gas separation or gas sensor devices.
Inventors
- 👤 Anthony J. Polak
- 👤 Ping Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:28
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D69/148; B01D71/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
126 words
A thin film polymer blend membrane comprised of a solution blend of (1) a component selected from the group consisting of (i) an organic polymer selected from the group consisting of polyvinyl alcohol, polyvinylfluoride, polyethyleneimine, polyethylene glycol, cellulose acetate, polyvinylmethylethyl ether and phenol formaldehylde resins and (ii) a copolymer having as a repeat unit one of the monomers of component (i), (2 ) a component selected from the group consisting of (i) a polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid and polystyrene sulfonic acid and (ii) a copolymer having as a repeat unit one of the monomers of component (i), and (3) an inorganic compound selected from the group consisting of phosphoric acid, sulfuric acid, heteropoly acids and salts of heteropoly acids.
Claim 2
Dependent Claim
126 words
A thin film polymer blend membrane comprised of a solution blend of (1) a component selected from the group consisting of (i) an organic polymer selected from the group consisting of polyvinyl alcohol, polyvinylfluoride, polyethyleneimine, polyethylene glycol, cellulose acetate, polyvinylmethylethyl ether and phenol formaldehylde resins and (ii) a copolymer having as a repeat unit one of the monomers of component (i), (2 ) a component selected from the group consisting of (i) a polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid and polystyrene sulfonic acid and (ii) a copolymer having as a repeat unit one of the monomers of component (i), and (3) an inorganic compound selected from the group consisting of phosphoric acid, sulfuric acid, heteropoly acids and salts of heteropoly acids.
Claim 3
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said inorganic compound comprises orthophosphoric acid.
Claim 4
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said inorganic compound comprises pyrophosphoric acid.
Claim 5
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said inorganic compound comprises sulfuric acid.
Claim 6
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said inorganic compound comprises dodecamolybdophosphoric acid.
Claim 7
Dependent Claim
17 words
The membrane as set forth in claim 1 in which said inorganic acid compound comprises uranyl orthophosphate.
Claim 8
Dependent Claim
17 words
The membrane as set forth in claim 1 in which said poly organic acid is poly(acrylic acid).
Claim 9
Dependent Claim
17 words
The membrane as set forth in claim 1 in which said poly organic acid is poly(methacrylic acid).
Claim 10
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said organic polymer is poly(vinyl alcohol).
Claim 11
Dependent Claim
16 words
The membrane as set forth in claim 1 in which said organic polymer is poly(vinyl fluoride).
Claim 12
Dependent Claim
65 words
The membrane as set forth in claim 1 in which said inorganic compound is present in said membrane in a range of from about 1 to about 49 mole percent, said organic polymer is present in a range of from about 50 to about 95 mole percent and said poly organic acid is present in a range from about 1 to about 49 mole percent.
Claim 13
Dependent Claim
30 words
The membrane as set forth in claim 1 in which said inorganic compound is orthophosphoric acid, said organic polymer is poly(vinyl alcohol) and said poly organic acid is poly(acrylic acid).
Claim 14
Dependent Claim
29 words
The membrane as set forth in claim 1 in which said inorganic compound is orthophosphoric acid, said organic polymer is poly(vinyl alcohol) and said organic acid is poly(methacrylic acid).
Claim 15
Dependent Claim
30 words
The membrane as set forth in claim 1 in which said inorganic compound is sulfuric acid, said organic polymer is poly(vinyl fluoride) and said poly organic acid is poly(acrylic acid).
Claim 16
Dependent Claim
31 words
The membrane as set forth in claim 1 in which said inorganic compound is uranyl orthophosphate, said organic polymer is poly(vinyl alcohol) and said poly organic acid is poly(styrene sulfonic acid).
Claim 17
Dependent Claim
26 words
The membrane as set forth in claim 1 in which said membrane possesses a thickness in the range of from about 0.1 to about 50 microns.
Claim 18
Dependent Claim
15 words
The membrane as set forth in claim 1 being composited on a porous solid support.
Claim 19
Dependent Claim
17 words
The membrane as set forth in claim 17 in which said porous solid support comprises glass cloth.
Claim 20
Dependent Claim
16 words
The membrane as set forth in claim 17 in which said porous solid support comprises polysulfone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |