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Patent US2625568A successfully refreshed from Google Patents.
US2625568A
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Ketone condensation products of bisphenyl type compounds
Assignee: Standard Oil Development Co
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Filing: 1951-03-27
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Granted: 1953-01-13
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Delmer L Cottle
- 👤 Wilbur F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:24
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C39/00; C07C39/12; C07C39/15; C07C39/16; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/04; C10M2207/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
AS NEW CHEMICALS KETONE CONDENSATION COMPOUNDS OF BISPHENYL TYPE COMPOUNDS, SAID NEW CHEMICALS CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
18 words
AS NEW CHEMICALS KETONE CONDENSATION COMPOUNDS OF BISPHENYL TYPE COMPOUNDS, SAID NEW CHEMICALS CORRESPONDING TO THE GENERAL FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |