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US3459808A
Expired / Lapsed
US
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Process for the preparation of phosphonium salts and phosphine oxides starting with aluminum trialkyl
Assignee: Procter and Gamble Co
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Filing: 1966-06-24
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Granted: 1969-08-05
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Expires: 1986-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert E Hall
- 👤 Adriaan Kessler
- 👤 Aubrey R Mclain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:42
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/52; C07F9/505; C07F9/53; C07F9/5304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3036132A
Cited
US3389183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |