Patent US3640880A successfully refreshed from Google Patents.
US3640880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard surface cleaner
Assignee: Lever Brothers Co
•
Filing: 1968-11-08
•
Granted: 1972-02-08
•
Expires: 1988-11-08
Abstract
Abstract A HARD SURFACE CLEANING COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF TWO OLEFIN SULPHONATES, PREDOMINANTLY OF 12 AND 20 CARBON CHAIN LENGTH RESPECTIVELY, SAID MIXTURE BEING THE SOLE ACTIVE OR FORMULATED IN COMBINATION WITH ANIONIC OR NONIONIC SURFACE AGENTS.
Inventors
- 👤 John Robert Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:22
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/14; C11D1/143; C11D1/37
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |