US2743294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New bis-alkylammonium ethers
Assignee: Pfizer Health AB
•
Filing: 1953-03-17
•
Granted: 1956-04-24
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Fakstorp Jorgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/367; C07C213/00; C07C213/08; C07C215/00; C07C215/02; C07C215/40; C07C217/00; C07C217/02; C07C217/04; C07C217/06; C07C217/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
THE NON-TOXIC SALTS OF A NEW ALKYL AMMONIUM ETHER HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
THE NON-TOXIC SALTS OF A NEW ALKYL AMMONIUM ETHER HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
6 words
THE NEW COMPOUND 2-DIMETHYLETHYLAMMONIUMETHYL-2''-TRIETHYLAMMONIUMETHYL ETHER BIS-MONOHYDROGENTARTRATE.
Claim 4
Dependent Claim
6 words
THE NEW COMPOUND 2-DIMETHYLETHYLAMMONIUMETHYL-2''-TRIETHYLAMMONIUMETHYL ETHER BIS-MONOHYDROGENTARTRATE.
References Cited (Backward Citations)
BE511219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |