US2759938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl pyridazinyl phosphate esters
Assignee: Wyeth Holdings LLC
•
Filing: 1955-03-21
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Granted: 1956-08-21
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Breuil Shirley Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:59
CPC Classifications
A; A01; A01N; A01N57/00; A01N57/10; A01N57/16; C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6509; C07F9/650905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A PHOSPHATE ESTER OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A PHOSPHATE ESTER OF THE GENERAL FORMULA
Claim 3
Independent Claim
11 words
A METHOD OF PREPARING A PHOSPHATE ESTER OF THE GENERAL FORMULA
Claim 4
Independent Claim
11 words
A METHOD OF PREPARING A PHOSPHATE ESTER OF THE GENERAL 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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |