US2918488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonic acid esters and a process for their production
Assignee: Bayer AG
•
Filing: 1958-10-27
•
Granted: 1959-12-22
•
Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Schrader Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:51
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075; A; A01; A01N; A01N57/00; A01N57/18; C07F9/4003; C07F9/4015; C07F9/4018; C07F9/4021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
PHOSPHONIC ACID ESTERS OF THE FOLLOWING FORMULA
Claim 2
Dependent Claim
7 words
PHOSPHONIC ACID ESTERS OF THE FOLLOWING FORMULA
Claim 3
Dependent Claim
13 words
A PROCESS FOR THE PREPARATION OF PHOSPHONIC ACID ESTERS OF THE FOLOWING FORMULA
Claim 4
Dependent Claim
13 words
A PROCESS FOR THE PREPARATION OF PHOSPHONIC ACID ESTERS OF THE FOLOWING FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |