Patent US3702804A successfully refreshed from Google Patents.
US3702804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolytic enzymes chemically coupled to cellulose ethers
Assignee: Ranks Hovis McDougall Ltd
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Filing: 1970-03-17
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Granted: 1972-11-14
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Expires: 1990-03-17
Abstract
Abstract A PROCESS FOR THE PREPARATION OF A WATER INSOLUBLE PULLULANASE, CARBOXYPEPTIDASE OR DEXTRANASE WHICH PROCESS COMPRISES REACTING AT 0-5*C. THE PULLULANASE, CARBOXYPEPTIDASE OR DEXTRANASE DISSOLVED IN A BUFFER WITHIN A PH RANGE OF 6.5-8.6 WITH THE P-DIAZOPHENYOXY-HYDROXYPROPYL ETHER OF CELLULOSE.
Inventors
- 👤 Sidney Alan Barker
- 👤 Peter John Somers
- 👤 Roger Epton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02; C12N11/10; C12N11/12; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/08; C12H; C12H1/00; C12H1/003
Claims Analysis
Total Claims: 0
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |