US2816111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonic acid derivatives
Assignee: Bayer AG
•
Filing: 1954-02-09
•
Granted: 1957-12-10
•
Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Wegler Richard
- 👤 Grewe Ferdinand
- 👤 Mehlhose Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:20
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/12; C07D209/00; C07D209/02; C07D209/44; C07D209/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A SULFONIC ACID DERIVATIVE HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
A SULFONIC ACID DERIVATIVE HAVING THE FORMULA
Claim 3
Dependent Claim
24 words
PROCESS FOR THE PRODUCTION OF SULFONIC ACID DERIVATIVES, WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING CYCLIC OXIMIDES HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
24 words
PROCESS FOR THE PRODUCTION OF SULFONIC ACID DERIVATIVES, WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING CYCLIC OXIMIDES HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2373298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |