Patent US3840541A successfully refreshed from Google Patents.
US3840541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-pyrazolopyrimidine-(thiono)-phosphoric-(phosphonic or phosphinic)-acid esters or ester-amides
Assignee: Bayer AG
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Filing: 1972-06-15
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Granted: 1974-10-08
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Expires: 1992-06-15
Abstract
Abstract 1. AN O-PYRAZOLOPYRIMIDINE - (THIONO) - PHOSPHORIC(PHOSPHONIC OR PHOSPINIC)-ACID ESTER OF THE FORMULA 2-(R1-P(=X)(-R2)-O-),3-R3-PYRAZOLO(1,5-A)PYRIMIDINE IN WHICH R1 IS ALKOXY OR ALKYL WITH 1 TO 6 CARBON ATOMS, R2 IS ALKYL OR ALKOXY WITH 1 TO 6 CARBON ATOMS OR PHENYL OR MONOALKYLAMINO OR DIALKYLAMINO WITH UP TO 6 CARBON ATOMS IN EACH ALKYL MOIETY, R3 IS HYDROGEN OR HALOGEN, AND X IS OXYGEN OR SULFUR.
Inventors
- 👤 R Coelln
- 👤 I Hammann
- 👤 G Unterstenhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:18
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6561
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
AN O-PYRAZOLOPYRIMIDINE - (THIONO) - PHOSPHORIC(PHOSPHONIC OR PHOSPINIC)-ACID ESTER OF THE FORMULA
Claim 2
Dependent Claim
12 words
AN O-PYRAZOLOPYRIMIDINE - (THIONO) - PHOSPHORIC(PHOSPHONIC OR PHOSPINIC)-ACID ESTER 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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |