Patent US2649478A successfully refreshed from Google Patents.
US2649478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long-chain alkylbenzenesulfonamide-ethylene oxide condensation products
Assignee: Wyeth Holdings LLC
•
Filing: 1949-06-22
•
Granted: 1953-08-18
•
Expires: 1969-06-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Carnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:03
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/15; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/905; Y10S516/909; Y10S516/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
THE PRODUCT FORMED BY CONDENSING UNDER ALKALINE CONDITIONS AT AN ELEVATED TEMPERATURE AT LEAST SIX MOLS ETHYLENE OXIDE WITH ONE MOL OF A PRIMARY LONG CHAIN-ALKYLBENZENESULFONAMIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |