US4591456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining homogeneous layers of native collagen, its application in covering or encapsulating various supports and the supports thus covered
Assignee: BASF Beauty Care Solutions France SAS
•
Filing: 1985-05-29
•
Granted: 1986-05-27
•
Expires: 2005-05-29
Abstract
Abstract A new process is disclosed for obtaining homogeneous layers of native collagen. Also disclosed is a new process for covering a support with a homogeneous layer of native collagen as well as supports covered thereby.
Inventors
- 👤 Alain Huc
- 👤 Rene Gimeno
- 👤 Daniel Herbage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:32
CPC Classifications
C; C08; C08L; C08L89/00; C08L89/04; C08L89/06; A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A process for producing a support coated with a homogeneous layer of native collagen which comprises the steps of: (a) forming an acid-soluble methanolic solution of native collagen; (b) applying the methanolic solution to a support to cover the support with a homogeneous layer of native collagen; (c) air-drying the coating on said support to a homogeneous layer of native collagen; and (d) subjecting the support coated during step (c) and after air-drying to a thermal treatment under vacuum at 100° C. for 24 hours, to assure reticulation of the collagen.
Claim 2
Dependent Claim
91 words
A process for producing a support coated with a homogeneous layer of native collagen which comprises the steps of: (a) forming an acid-soluble methanolic solution of native collagen; (b) applying the methanolic solution to a support to cover the support with a homogeneous layer of native collagen; (c) air-drying the coating on said support to a homogeneous layer of native collagen; and (d) subjecting the support coated during step (c) and after air-drying to a thermal treatment under vacuum at 100° C. for 24 hours, to assure reticulation of the collagen.
Claim 3
Dependent Claim
20 words
The process defined in claim 1 wherein in step (b), the methanolic solution is applied to the support by spraying.
Claim 4
Dependent Claim
23 words
The process defined in claim 1, wherein in step (b), the methanolic solution is applied to the support by immersing and running off.
Claim 5
Dependent Claim
23 words
A support covered by a homogeneous layer of native collagen wherein the support is covered according to the process defined in claim 1.
References Cited (Backward Citations)
US2928822A
Cited
US3157524A
Cited
US3152203A
Cited
US3393080A
Cited
US3649347A
Cited
US3823212A
Cited
US4185011A
Cited
US4295894A
Cited
US4420339A
Cited
US4451397A
Cited
FR2524471A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |