US3849435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imidazolinium salts as softening agents for textiles
Assignee: Hoechst AG
•
Filing: 1973-03-01
•
Granted: 1974-11-19
•
Expires: 1993-03-01
Abstract
Abstract 1. A COMPOUND OF THE FORMULA (1-R2,2-R,3-(R1-CH(-OH)-CH2-X-CH2-CH2-)-IMIDAZOLINIUM)A(-) IN WHICH R REPRESENTS ALKYL OR ALKENYL OF 7 TO 21 ATOMS, R1 REPRESENTS ALKYL OR ALKENYL OF 6 TO 18 CARCARBON ATO S, OF WHICH RADICALS R AND R1 AT LEAST ONE CONTAINS MORE THAN 14 CARBON ATOMS, R4 REPRESENTS METHYL OR ETHYL, X REPRESENTS OXYGEN OR -NH- AND A(-) REPRESENTS C1(-) OR R2-OSO3(-). EPRE-
Inventors
- 👤 H Diery
- 👤 E Milewski
- 👤 U Cuntze
- 👤 A May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/38; C11D1/62; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/14; C07D233/16; C11D3/00; C11D3/0005; C11D3/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |