US4052381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted phosphorothioic acid and method of use in siphonaptera compositions in warm-blooded animals
Assignee: Wyeth Holdings LLC
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Filing: 1975-04-21
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Granted: 1977-10-04
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Expires: 1995-04-21
Abstract
Abstract This invention relates to phosphorothioic acid, O,O'-azodi-p-phenylene O,O,O',O' tetramethyl ester, trans and its use in siphonaptera compositions in warm-blooded animals.
Inventors
- 👤 Michael Stanley Schrider
- 👤 Stephen David Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:11
CPC Classifications
A; A01; A01N; A01N57/00; A01N57/10; A01N57/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
The compound phosphorothioic acid, O,O'-azodi-p-phenylene O,O,O',O' tetramethyl ester, trans.
Claim 2
Dependent Claim
9 words
The compound phosphorothioic acid, O,O'-azodi-p-phenylene O,O,O',O' tetramethyl ester, trans.
References Cited (Backward Citations)
US2947663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |