Patent US2579330A successfully refreshed from Google Patents.
US2579330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylol phenol unsaturatep
Assignee: —
•
Filing: —
•
Granted: 1951-12-18
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Expires: 1968-12-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:53
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE METHOD OF PREPARING A COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
25 words
A HEAT-CONVERTED MATERIAL OBTIAINED BY HEATING AT A TEMPERATURE OF FROM 75* TO 250* C. A COMPOSITION COMPRISING A COMPOUND CORRESPONDINT TO THE GENERAL FORMULA
References Cited (Backward Citations)
US2558688A
Cited
US2495232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |