Patent EP0254628A1 successfully refreshed from Google Patents.
US3213057A
Expired / Lapsed
US
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Organo-phosphorus compounds
Assignee: Melpar Inc
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Filing: 1960-12-06
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Granted: 1965-10-19
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Paul E Ritt
- 👤 Lee M Kindley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5333; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2160840A
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US2646420A
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US2839494A
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US2913498A
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US2947725A
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US2969398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |