US2689864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dicarboxylic sulfones
Assignee: MONSASNTO CHEMICAL Co
•
Filing: 1950-04-20
•
Granted: 1954-09-21
•
Expires: 1970-04-20
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Robert A Heimsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
C; C07; C07C; C07C317/00; C07C317/44; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
SULFONES HAVING THE GENERAL STRUCTURE:
Claim 2
Dependent Claim
5 words
SULFONES HAVING THE GENERAL STRUCTURE:
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |