Patent US2640847A successfully refreshed from Google Patents.
US2640847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of neutral esters of thiolphosphoric acid
Assignee: Bayer AG
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Filing: 1949-05-21
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Granted: 1953-06-02
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Expires: 1969-05-21
Abstract
No abstract record available.
Inventors
- 👤 Schrader Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:58
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR THE PRODUCTION OF NEUTRAL ESTERS OF THIOLPHOSPHORIC ACID, WHICH COMPRISES SLIGHTLY HEATING A MIXTURE OF AN ALKALI SALT OF A DIALKYL PHOSPHITE WITH A COMPOUND OF THE GROUP CONSISTING OF ALKYL THIOCYANATES, SUBSTITUTED ALKYL THIOCYANATES AND ALKYLENE DITHIOCYANATES.
Claim 2
Dependent Claim
41 words
A PROCESS FOR THE PRODUCTION OF NEUTRAL ESTERS OF THIOLPHOSPHORIC ACID, WHICH COMPRISES SLIGHTLY HEATING A MIXTURE OF AN ALKALI SALT OF A DIALKYL PHOSPHITE WITH A COMPOUND OF THE GROUP CONSISTING OF ALKYL THIOCYANATES, SUBSTITUTED ALKYL THIOCYANATES AND ALKYLENE DITHIOCYANATES.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |