US2750389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium compounds and process of preparing them
Assignee: Crown Chemical Corp
•
Filing: 1954-06-24
•
Granted: 1956-06-12
•
Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Pingree
- 👤 Chester U Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20; D; D06; D06M; D06M13/00; D06M13/322
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
THE PROCESS OF PRODUCING QUATERNARY AMMONIUM COMPOUNDS, WHICH ARE WATER-DISPERSIBLE PER SE, WHICH COMPRISES REACTING A CHLOROMETHYL ACID AMIDE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
23 words
THE PROCESS OF PRODUCING QUATERNARY AMMONIUM COMPOUNDS, WHICH ARE WATER-DISPERSIBLE PER SE, WHICH COMPRISES REACTING A CHLOROMETHYL ACID AMIDE OF THE GENERAL FORMULA
Claim 3
Dependent Claim
12 words
THE PRODUCTS SECURED BY THE PROCESS SET OUT IN CLAIM 1 SUPRA.
References Cited (Backward Citations)
US2510007A
Cited
US2654758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |