US2876245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of heterocyclic dithiophosphate ketoesters
Assignee: Union Carbide Corp
•
Filing: 1955-07-01
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Granted: 1959-03-03
•
Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657109; C07F9/657118
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
AS NEW COMPOUNDS KETO-ESTERS OF HETEROCYCLIC DITHIOPHOSPHORIC ACIDS, SAID ESTERS HAVING STRUCTURES CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
16 words
AS NEW COMPOUNDS KETO-ESTERS OF HETEROCYCLIC DITHIOPHOSPHORIC ACIDS, SAID ESTERS HAVING STRUCTURES CORRESPONDING TO THE FORMULA:
Claim 3
Dependent Claim
24 words
PROCESS FOR PRODUCING KETO-ESTERS OF HETEROCYCLIC DITHIOPHOSPHORIC ACIDS CONTAINING PHOSPHROUS IN THE HETROCYCLIC RING, WHICH COMPRISES REACTING A HETEROCYCLIC DITHIOPHOSPHORIC ACID OF THE FORMULA
Claim 4
Dependent Claim
24 words
PROCESS FOR PRODUCING KETO-ESTERS OF HETEROCYCLIC DITHIOPHOSPHORIC ACIDS CONTAINING PHOSPHROUS IN THE HETROCYCLIC RING, WHICH COMPRISES REACTING A HETEROCYCLIC DITHIOPHOSPHORIC ACID OF THE FORMULA
References Cited (Backward Citations)
US2632020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |