US2850535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low foaming non-ionic surface-active
Assignee: —
•
Filing: —
•
Granted: 1958-09-02
•
Expires: 1975-09-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:48
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D1/722; C11D3/00; C11D3/0005; C11D3/0026; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A METHOD FOR THE PREPARATION OF A LOW FOAMING NONIONIC SURFACE-ACTIVE AGENT WHICH COMPRISES HEATING A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
20 words
A METHOD FOR THE PREPARATION OF A LOW FOAMING NONIONIC SURFACE-ACTIVE AGENT WHICH COMPRISES HEATING A COMPOUND HAVING THE FORMULA
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |