US2567008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl esters of 4-chlorobenzene sulfonic acid
Assignee: Dow Chemical Co
•
Filing: 1949-10-31
•
Granted: 1951-09-04
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Harold R Slagh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:46
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/63; C07C309/72; C07C309/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE 3-CHLORO-2-BIPHENYLYL ESTER OF 4-CHLOROBENZENE SULFONIC ACID.
Claim 2
Dependent Claim
7 words
THE 3-CHLORO-2-BIPHENYLYL ESTER OF 4-CHLOROBENZENE SULFONIC ACID.
References Cited (Backward Citations)
US2148928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |