Patent US2662894A successfully refreshed from Google Patents.
US2662894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-phenyl-2, 3-dimethyl-4-amino-5-pyrazolone-n-phosphoric acid dialkyl-seters
Assignee: Individual
•
Filing: 1950-10-02
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Granted: 1953-12-15
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Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Tonutti Emil
- 👤 Schoeller Walter
- 👤 Jonas Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6503; C07F9/65031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AS A NEW COMPOUND, A LOWER DIALKYL ESTER OF 1-PHENYL-2,3-DIMETHYL-4-AMINO-5-PYRAZOLENEN-PHOSPHORIC ACID CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
16 words
AS A NEW COMPOUND, A LOWER DIALKYL ESTER OF 1-PHENYL-2,3-DIMETHYL-4-AMINO-5-PYRAZOLENEN-PHOSPHORIC ACID CORRESPONDING TO 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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |