US4581148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depilating composition and method
Assignee: Birko Corp
•
Filing: 1984-08-24
•
Granted: 1986-04-08
•
Expires: 2004-08-24
Abstract
Abstract A hair removing composition for use on carcasses, skins, hides, and pelts, containing preselected proportions of alkali, buffering agents, surface active agents, foaming agents, and stabilizers in combination with preselected thioglycolates.
Inventors
- 👤 Harley D. Swanson
- 👤 Terry L. McAninch
- 👤 J. Keith Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:17
CPC Classifications
C; C14; C14C; C14C1/00; C14C1/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
A composition for dissolving hair comprising: ______________________________________
Approx. Wt. (%)
______________________________________
Water 87.00-94.00
Sodium Hydroxide 4.00-8.00
Trisodium Phosphate 2.00-3.00
Sodium Gluconate 0.25-1.00
Triethanolamine Dodecyl Benzene
0.10-0.50
Sulfonate
Sodium Metasilicate 0.10-0.50
______________________________________
Claim 2
Dependent Claim
31 words
A composition for dissolving hair comprising: ______________________________________
Approx. Wt. (%)
______________________________________
Water 87.00-94.00
Sodium Hydroxide 4.00-8.00
Trisodium Phosphate 2.00-3.00
Sodium Gluconate 0.25-1.00
Triethanolamine Dodecyl Benzene
0.10-0.50
Sulfonate
Sodium Metasilicate 0.10-0.50
______________________________________
Claim 3
Dependent Claim
30 words
A composition for dissolving hair comprising: ______________________________________
Approx. Wt. (%)
______________________________________
Water 89.15
Sodium Hydroxide 7.25
Trisodium Phosphate 2.50
Sodium Gluconate 0.50
Triethanolamine Dodecyl Benzene
0.30-Sulfonate
Sodium Metasilicate 0.30
______________________________________
Claim 4
Dependent Claim
30 words
A composition for dissolving hair comprising: ______________________________________
Approx. Wt. (%)
______________________________________
Water 89.15
Sodium Hydroxide 7.25
Trisodium Phosphate 2.50
Sodium Gluconate 0.50
Triethanolamine Dodecyl Benzene
0.30-Sulfonate
Sodium Metasilicate 0.30
______________________________________
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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |