Patent US2855423A successfully refreshed from Google Patents.
US2855423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-aryl o-lower alkyl phosphorohydrazidothioates
Assignee: Dow Chemical Co
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Filing: 1956-04-30
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Granted: 1958-10-07
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Etcyl H Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:28
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/24; C07F9/2454; C07F9/2479; C07F9/2491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A PHOSPHOROHYDRAZIDOTHIOATE HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A PHOSPHOROHYDRAZIDOTHIOATE HAVING THE FORMULA
References Cited (Backward Citations)
US2552541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |