US4978805A
Expired / Lapsed
US
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Polyethers
Assignee: BASF SE
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Filing: 1989-06-09
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Granted: 1990-12-18
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Expires: 2009-06-09
Abstract
Abstract Polyethers I <IMAGE> I <IMAGE> R1 and R2 are each C1-C20-alkyl, n and m are each from 1 to 30 and r is from 0 to 20, are used mainly as surfactants in detergent and cleaning agent formulations.
Inventors
- 👤 Richard Baur
- 👤 Stefan Birnbach
- 👤 Alfred Oftring
- 👤 Ekhard Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609; C09; C09K; C09K23/00; C09K23/42; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D1/721; C09K23/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
A polyether of the formula I ##STR7## where the radicals A are identical or different units of the structure ##STR8## R 1 and R 2 are each C 9 -C 20 -alkyl, n and m are each from 1 to 30 and r is from 0 to 20.
Claim 2
Dependent Claim
48 words
A polyether of the formula I ##STR7## where the radicals A are identical or different units of the structure ##STR8## R 1 and R 2 are each C 9 -C 20 -alkyl, n and m are each from 1 to 30 and r is from 0 to 20.
Claim 3
Dependent Claim
15 words
A polyether as claimed in claim 1, wherein A is --CH 2 --CH 2 --.
Claim 4
Dependent Claim
20 words
A polyether as claimed in claim 1, wherein R 1 and R 2 are each C 9 -C 15 -alkyl.
Claim 5
Dependent Claim
21 words
A polyether as claimed in claim 1, wherein the radicals --(O--A) m --O--R 1 and (--O--A) n --O--R 2 are identical.
References Cited (Backward Citations)
US2932616A
Cited
GB1441835A
Cited
US4241224A
Cited
US4375565A
Cited
JPS5976012A
Cited
EP0243713A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |