Patent DE740366C successfully refreshed from Google Patents.
Patent US2987555A successfully refreshed from Google Patents.
US2987555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyalkylated
Assignee: —
•
Filing: —
•
Granted: 1961-06-06
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Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:50
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS WHICH COMPRISES THE STEPS OF REACTING A PHENOL WITH A 1,2-ALKYLENE CARBONATE IN THE PRESENCE OF FROM ABOUT 0.025 TO ABOUT 0.10 PERCENT BY WEIGHT, A CATALYTIC AMOUNT, OF AN ALKALI METAL HYDRIDE TO OBTAIN A O-(HYDROXYALKYLATED)PHENOL PRODUCT.
Claim 2
Dependent Claim
40 words
A PROCESS WHICH COMPRISES THE STEPS OF REACTING A PHENOL WITH A 1,2-ALKYLENE CARBONATE IN THE PRESENCE OF FROM ABOUT 0.025 TO ABOUT 0.10 PERCENT BY WEIGHT, A CATALYTIC AMOUNT, OF AN ALKALI METAL HYDRIDE TO OBTAIN A O-(HYDROXYALKYLATED)PHENOL PRODUCT.
References Cited (Backward Citations)
US2448767A
Cited
DE938012C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |