Patent US3331878A successfully refreshed from Google Patents.
US3331878A
Expired / Lapsed
US
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Tertiary phosphine oxides
Assignee: Lever Brothers Co
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Filing: 1963-12-10
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Granted: 1967-07-18
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Expires: 1983-12-10
Abstract
No abstract record available.
Inventors
- 👤 Hill M Priestley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:36
CPC Classifications
C; C11; C11D; C11D10/00; C11D10/04; C11D10/045; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C11D1/00; C11D1/66; C11D1/79
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
PHOSPHINE OXIDES OF THE GENERAL FORMULAS:
Claim 2
Dependent Claim
6 words
PHOSPHINE OXIDES OF THE GENERAL FORMULAS:
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |