Patent US2806846A successfully refreshed from Google Patents.
US2806846A
Expired / Lapsed
US
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Addition products of propenoic acid amides and acidic, phosphorus- and sulfur-containing products
Assignee: Tidewater Oil Co
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Filing: 1954-03-17
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Granted: 1957-09-17
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Expires: 1974-03-17
Abstract
No abstract record available.
Inventors
- 👤 John W Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:48
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/04; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04
Claims Analysis
Total Claims: 0
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |