US2765315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of esters
Assignee: Rohm and Haas Co
•
Filing: 1954-04-26
•
Granted: 1956-10-02
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Richard C Mansfield
- 👤 Claude J Schmidle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:17
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/52; C07D211/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A PROCESS FOR PREPARING ESTERS OF THE STRUCTURE
Claim 2
Dependent Claim
8 words
A PROCESS FOR PREPARING ESTERS OF THE STRUCTURE
References Cited (Backward Citations)
US2498433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |