US3766013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of water-insoluble carrier bound enzymes
Assignee: Wyeth Holdings LLC
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Filing: 1971-08-24
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Granted: 1973-10-16
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Expires: 1991-08-24
Abstract
Abstract Water-insoluble, catalytically active, carrier bound enzyme materials physically dispersed throughout the interstices of the network of interconnected, interwoven fibers of polytetrafluoroethylene, and a method for their production, are disclosed.
Inventors
- 👤 P Forgione
- 👤 R Polistina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:34
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/003; B01J31/02; B01J31/06; B01J35/00; B01J35/50; B01J35/58; C; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/082; C12N11/089
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
13 words
A method according to claim 1 wherein said carrier is a carbonyl polymer.
Claim 2
Dependent Claim
12 words
A method according to claim 2 wherein said carbonyl polymer is polyacrolein.
Claim 3
Dependent Claim
12 words
A method according to cLaim 1 wherein said enzyme is glucose isomerase.
Claim 4
Dependent Claim
35 words
A composition comprising a fibrillated polytetrafluoroethylene having a water-insoluble, catalytically active, carrier-bound enzyme material physically dispersed throughout the interstices of the network of the interconnected, interwoven fibers thereof produced by the process of claim 1.
Claim 5
Dependent Claim
12 words
A composition according to claim 5 wherein said enzyme is glucose isomerase.
Claim 6
Dependent Claim
13 words
A composition according to claim 5 wherein said enzyme material is glucose oxidase.
Claim 7
Dependent Claim
13 words
A composition according to claim 5 wherein said carrier is a carbonyl polymer.
Claim 8
Dependent Claim
12 words
A composition according to claim 8 wherein said carbonyl polymer is polyacrolein.
Claim 9
Dependent Claim
11 words
A composition according to claim 5 wherein said enzyme is rennin.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |