Patent US2735734A successfully refreshed from Google Patents.
Patent US4073954A successfully refreshed from Google Patents.
US4073954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing tannins and reducing clouding in drinks
Assignee: Individual
•
Filing: 1976-02-03
•
Granted: 1978-02-14
•
Expires: 1996-02-03
Abstract
Abstract A method for removing tannins from liquid fruit drinks, vegetable drinks, and fermented liquids of vegetable and fruit origin which comprises contacting the liquid with at least one highly dispersed polymer obtained by condensing a monomer selected from the group consisting of polyamino compounds, polyhydroxy compounds and mixtures thereof, with formaldehyde. Polymers useful in the method of the invention should have a specific surface area of over 20 m 2 /g and a positive zeta potential in a solution having a pH of from 3 to 5. The polymers of the invention may be easily separated from the contacted liquid using standard filtration techniques.
Inventors
- 👤 Christian H. Mobius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:05
CPC Classifications
C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0416; C12H1/0424
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
A method of removing tannins from liquid fruit drinks, vegetable drinks, and fermented liquids of vegetable and fruit origin which comprises contacting the liquid with at least one highly dispersed polymer insoluble in the liquid and for a time sufficient to absorb the tannins and reduce clouding in the liquid, the polymer being obtained by condensing a monomer selected from the group consisting of polyamino compounds, polyhydroxy compounds and mixtures thereof, with formaldehyde, said polymer being further characterized as having a specific surface area of at least 20m 2 /g and a positive zeta potential in a solution having a pH of from 3 to 5, and subsequently separating the polymer from the contacted liquid.
Claim 2
Independent Claim
115 words
A method of removing tannins from liquid fruit drinks, vegetable drinks, and fermented liquids of vegetable and fruit origin which comprises contacting the liquid with at least one highly dispersed polymer insoluble in the liquid and for a time sufficient to absorb the tannins and reduce clouding in the liquid, the polymer being obtained by condensing a monomer selected from the group consisting of polyamino compounds, polyhydroxy compounds and mixtures thereof, with formaldehyde, said polymer being further characterized as having a specific surface area of at least 20m 2 /g and a positive zeta potential in a solution having a pH of from 3 to 5, and subsequently separating the polymer from the contacted liquid.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the highly dispersed polymer is obtained by the condensation of melamine with formaldehyde.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein the highly dispersed polymer is characterized as having a specific surface area of from 20 to 250 m 2 /g.
Claim 5
Dependent Claim
25 words
A method according to claim 3, wherein the highly dispersed polymer is characterized as having a specific surface area of over 50 m 2 /g.
Claim 6
Dependent Claim
25 words
A method according to claim 1, wherein the highly dispersed polymer is characterized as having an average grain size of from 1 to 50 μ.
Claim 7
Dependent Claim
25 words
A method according to claim 5, wherein the highly dispersed polymer is characterized as having an average grain size of from 1 to 10 μ.
Claim 8
Dependent Claim
33 words
A method according to claim 1, wherein the highly dispersed polymer is characterized as having a zeta potential of at least +5mV in a solution having a pH of from 3 to 5.
Claim 9
Dependent Claim
33 words
A method according to claim 7 wherein the highly dispersed polymer is characterized as having a zeta potential of +5 to +70mV in a solution having a pH of from 3 to 5.
Claim 10
Dependent Claim
33 words
A method according to claim 7, wherein the highly dispersed polymer is characterized as having a zeta potential of at least +30mV in a solution having a pH of from 3 to 5.
Claim 11
Dependent Claim
33 words
A method according to claim 9, wherein the highly dispersed polymer is characterized as having a zeta potential of +35 to +45mV in a solution having a pH of from 3 to 5.
References Cited (Backward Citations)
CA528402A
Cited
CA625730A
Cited
GB808432A
Cited
US3245804A
Cited
GB975733A
Cited
US3436225A
Cited
US3512988A
Cited
US3597351A
Cited
US3878300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |