Patent US2643265A successfully refreshed from Google Patents.
US2643265A
Expired / Lapsed
US
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Bis (dialkyl phosphate) esters of alkylidene diphenols
Assignee: Victor Chemical Works
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Filing: 1950-09-15
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Granted: 1953-06-23
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Expires: 1970-09-15
Abstract
No abstract record available.
Inventors
- 👤 Toy Arthur Dock Fon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:24
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE NEW COMPOUND: THE BIS(DIALKYL PHOSPHATE) ESTER OF AN AKLYLIDENE DIPHENOL, HAVING THE FORMULA
Claim 2
Dependent Claim
14 words
THE NEW COMPOUND: THE BIS(DIALKYL PHOSPHATE) ESTER OF AN AKLYLIDENE DIPHENOL, HAVING THE FORMULA
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |