US3755085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of enzyme deactivation by chlorine
Assignee: Procter and Gamble Co
•
Filing: 1970-09-30
•
Granted: 1973-08-28
•
Expires: 1990-09-30
Abstract
Abstract Enzyme deactivation during fabric laundering in water is prevented by using the enzyme in combination with a chlorine scavenger which is capable of reacting with residual chlorine in the water.
Inventors
- 👤 F Tivin
- 👤 E Zeffren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/30; C11D3/38; C11D3/386; C11D3/38663
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
A method according to claim 1 in which the chlorine scavenger is tris(hydroxymethyl)aminomethane.
References Cited (Backward Citations)
US3189518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |