Patent US3759833A successfully refreshed from Google Patents.
US3759833A
Expired / Lapsed
US
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Detergent compositions
Assignee: Lever Brothers Co
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Filing: 1971-12-29
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Granted: 1973-09-18
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Expires: 1991-12-29
Abstract
Abstract A DETERGENT COMPOSITION INCORPORATED FROM 1 TO 60% BY WEIGHT OF A WATER-SOLUBLE OR WATER-DISPERSIBLE SALT OF A HETEROCYCLIC DICARBOXYLIC ACID HAVING THE GENERAL FORMULA: WHEREIN R CAN BE HYDROGEN OR A SUBSTITUENT SUCH AS BROMINE, CHLORINE, HYDROXY, CARBOXY, C1-4 ALKYL, AMINO OR ALKYL-SUBSTITUTED AMINO, THE SALT ACTS AS A DETERGENCY BUILDER, AND MAY ACT ALSO AS AN INHIBITOR FOR THE DECOMPOSITION, CAUSED BY HEAVY-METAL CATALYSIS, OF ANY PEROXYCOMPOUNDS SUCH AS PERBORATES, IN THE DETERGENT COMPOSITION. 2-(HOOC-),4-R,6-(HOOC-)PYRIDINE
Inventors
- 👤 D Easton
- 👤 G Rennie
- 👤 C Storer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:42
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/28
Claims Analysis
Total Claims: 0
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |