Patent US2852513A successfully refreshed from Google Patents.
US2852513A
Expired / Lapsed
US
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Thiophosphoric acid esters and their production
Assignee: Bayer AG
•
Filing: 1957-04-17
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Granted: 1958-09-16
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Schrader Gerhard
- 👤 Dorken August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:09
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; A; A01; A01N; A01N57/00; A01N57/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A THIOPHOSPHORIC ACID OF THE FORMULA
Claim 2
Dependent Claim
6 words
A THIOPHOSPHORIC ACID OF THE 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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |