US3607653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bacterial protease compositions and process for preparing them
Assignee: PMP ACQUISITION Corp A DE CORP
•
Filing: 1968-07-16
•
Granted: 1971-09-21
•
Expires: 1988-07-16
Abstract
Abstract Polyethylene glycol polymers are incorporated with bacterial protease in order to improve granular characteristics and also to stabilize the protease and decrease the typical protease odor.
Inventors
- 👤 Jack Ziffer
- 👤 Simon Rothenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:48
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38672; B; B01; B01J; B01J2/00; B01J2/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
26 words
A composition as claimed in claim 1 in which said polyethylene glycol polymer is present in an amount sufficient to enhance the stability of said protease.
Claim 2
Dependent Claim
23 words
A composition as claimed in claim 1 in which said polyethylene glycol polymer has an average molecular weight within the range of 950-7,500.
Claim 3
Dependent Claim
23 words
A composition as claimed in claim 1 in which said polyethylene glycol polymer has an average molecular weight within the range of 3,000-3,700.
Claim 4
Dependent Claim
27 words
A composition as claimed in claim 1 in which the weight ratio of said polymer to said protease is within the range of 1:8 to 1: 3.
Claim 5
Dependent Claim
68 words
A process for preparing a granular composition consisting essentially of bacterial protease and a water soluble normally solid polyethylene glycol polymer which comprises dissolving a water soluble normally solid polyethylene glycol polymer in an aqueous concentrate of bacterial protease, the amount of said polymer being sufficient to improve the granulating properties of the resultant composition when dried, thereafter drying the resultant composition and forming the product into granules.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 6 in which said polyethylene glycol polymer is added after said bacterial protease has been dried.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 6 in which said polyethylene glycol polymer has an average molecular weight within the range of 3,000 to 3,700.
Claim 8
Dependent Claim
26 words
A process as claimed in claim 6 in which the weight ratio of said polymer to said protease is within the range of l:8 to l:3.
Claim 9
Dependent Claim
24 words
A process as claimed in claim 6 in which the resultant composition comprises approximately 17-20 percent polyethylene glycol polymer and 83-80 percent bacterial protease.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |