US2860987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for precipitating tannins and proteinaceous materials from liquid media
Assignee: GAF Chemicals Corp
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Filing: 1957-10-31
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Granted: 1958-11-18
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Werner Jesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; A; A23; A23F; A23F3/00; A23F3/16; A23F3/20; A23F3/205; A23L; A23L2/00; A23L2/70; A23L2/80; A23L5/00; A23L5/20; A23L5/27; A23L5/273; C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0416; C12H1/0424
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS OF PRECIPITATING SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF NATURAL TANNINS AND PROTEIN-TANNIN COMPLEXES FROM LIQUID MEDIUMS CONTAINING THE SAME WHICH COMPRISES ADDING TO SAID LIQUID MEDIUM, IN A PRECIPITATING AMOUNT, A POLYACRYLAMIDE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
40 words
THE PROCESS OF PRECIPITATING SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF NATURAL TANNINS AND PROTEIN-TANNIN COMPLEXES FROM LIQUID MEDIUMS CONTAINING THE SAME WHICH COMPRISES ADDING TO SAID LIQUID MEDIUM, IN A PRECIPITATING AMOUNT, A POLYACRYLAMIDE HAVING THE FOLLOWING GENERAL FORMULA:
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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |