US2471472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming phosphonic and thiophosphonic acid chlorides
Assignee: Victor Chemical Works
•
Filing: 1945-04-28
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Granted: 1949-05-31
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Expires: 1965-04-28
Abstract
No abstract record available.
Inventors
- 👤 Willard H Woodstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:44
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/42; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/06; C10M2223/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286792A
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US2279502A
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US2279501A
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US2286794A
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US2365466A
Cited
US2389576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |