Patent US3793228A successfully refreshed from Google Patents.
US3793228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions containing maleic acid vinyl alcohol copolymers as builders
Assignee: Knapsack AG
•
Filing: 1972-10-24
•
Granted: 1974-02-19
•
Expires: 1992-10-24
Abstract
Abstract BUILDERS FOR DETERGENT AND CLEANING AGENTS. THE BUILDERS ARE COMPRISED OF WATER-SOLUBLE SATS OF COTELOMERS OR COPOLYMERS OF VIINYL ALCOHOL WITH MALEIC ACID. D R A W I N G
Inventors
- 👤 A Kohlkamp
- 👤 H Landgraber
- 👤 K Henning
- 👤 J Kandler
- 👤 K Merkenich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:51
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |