US2548892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color and stain removers for
Assignee: —
•
Filing: —
•
Granted: 1951-04-17
•
Expires: 1968-04-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/38; C11D1/62; C11D3/00; C11D3/02; C11D3/04; C11D3/046; C11D1/66; C11D1/72; C11D3/042; C11D3/16; C11D3/20; C11D3/2068; C11D3/2075; C11D3/2079; C11D3/2086; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D7/22; C11D7/26; C11D7/265; C11D2111/00; C11D2111/10; C11D2111/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A SOLID DRY COLOR AND STAIN REMOVER FOR FABRICS CONSISTING ESSENTIALLY OF 100 PARTS OF BASIC ZINC SULFOXYLATE FORMALDEHYDE, A SOLID DRY A-HYDROXY CARBOXYLIC ACID AND 1 TO 20 PARTS OF PARA DIISOBUTYL PHENOXY ETHOXY ETHYL DIMETHYL BENZYL AMMONIUM CHLORIDE, THE SOLID DRY A-HYDROXY CARBOXYLIC ACID AND THE AMOUNT THEREOF BEING SELECTED FROM THE CLASS CONSISTING OF 45 TO 150 PARTS OF CITRIC ACID, 50 TO 90 PARTS OF TARTARIC ACID, 60 TO 200 PARTS OF MALIC ACID 70 TO 200 PARTS OF HYDROXYACETIC ACID.
References Cited (Backward Citations)
US1151416A
Cited
US1524737A
Cited
GB331194A
Cited
US1958483A
Cited
US2003928A
Cited
US2393865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |