US3238248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organophosphorus compounds
Assignee: Wyeth Holdings LLC
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Filing: 1962-11-06
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Granted: 1966-03-01
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Expires: 1982-11-06
Abstract
No abstract record available.
Inventors
- 👤 Michael M Rauhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:42
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C10M2223/00; C10M2223/06; C10M2223/063; C10M2223/065; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A METHOD OF PREPARING DITHIO-SUBSTITUTED SECONDARY ORGANOPHOSPHORUS COMPOUNDS CONSISTING ESSENTIALLY IN BRINGING SECONDARY PHOSPHINES SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Independent Claim
20 words
A METHOD OF PREPARING DITHIO-SUBSTITUTED SECONDARY ORGANOPHOSPHORUS COMPOUNDS CONSISTING ESSENTIALLY IN BRINGING SECONDARY PHOSPHINES SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |