Patent US3801463A successfully refreshed from Google Patents.
US3801463A
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Preparation of enzymes in particulate form
Assignee: DSM Delft BV
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Filing: 1971-10-13
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Granted: 1974-04-02
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Expires: 1991-10-13
Abstract
Abstract A process for preparing an enzyme composition in particulate form by centrifugally dispersing a liquid containing an enzyme and a binder from identical teeth which move along a circular path in a horizontal or substantially horizontal plane, said teeth having tops arranged to form droplets which are allowed to travel freely through a cooling zone to form solid particles comprising the enzyme and the binder. The process results in enzyme-containing particles having a narrow range of particle sizes and substantially no dust fraction, which enzyme-containing particles are extremely useful for inclusion in washing compositions.
Inventors
- 👤 P Eygermans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38672; B; B01; B01J; B01J2/00; B01J2/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
A process of claim 1 wherein the binder used will solidify between 40* and 60* C.
Claim 2
Dependent Claim
15 words
A process of claim 2 wherein the binder will solidify between 50* and 55* C.
Claim 3
Dependent Claim
15 words
A process of claim 1 wherein the binder used is a fatty alcohol-ethylene oxide adduct.
Claim 4
Dependent Claim
25 words
A process of claim 4 wherein the fatty alcohol-ethylene oxide adduct is the C18-fatty alcohol-ethylene oxide adduct containing about 80 moles of ethylene oxide units.
Claim 5
Dependent Claim
16 words
A process of claim 1 wherein the enzyme is a protease produced by a Bacillus strain.
Claim 6
Dependent Claim
16 words
A process of claim 1 wherein the enzyme is bound as a complex with a polymer.
Claim 7
Dependent Claim
13 words
A process of claim 7 wherein the polymer is a maleic acid-styreNe polymer.
Claim 8
Dependent Claim
47 words
A process of claim 1 wherein the teeth are formed on the periphery of a horizontal disc having a substantially planar upper surface and a plan view such that the teeth are equiangularly spaced and the peripheral form of the disc between each tooth is outwardly concave.
Claim 9
Dependent Claim
18 words
A process of claim 9 wherein the adjacent teeth are separated by a V-notch or an arcuate notch.
Claim 10
Dependent Claim
24 words
A process of claim 1 wherein the cooling zone comprises a fluid at a temperature well below the weakening temperature of the binder employed.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |