US2828326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfophthalate esters
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-02-03
•
Granted: 1958-03-25
•
Expires: 1976-02-03
Abstract
No abstract record available.
Inventors
- 👤 Edward L Doerr
- 👤 Robert E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:30
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/57; C07C309/58; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
AS NEW COMPOUNDS, SULFOPHTHALES OF THE FOLLOWING FORMULA, AND THE SALTS THEREOF:
Claim 2
Dependent Claim
12 words
AS NEW COMPOUNDS, SULFOPHTHALES OF THE FOLLOWING FORMULA, AND THE SALTS THEREOF:
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |