US2675411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis(4-beta-hydroxyalkoxyphenyl) ketones and process of preparation
Assignee: Eastman Kodak Co
•
Filing: 1952-11-26
•
Granted: 1954-04-13
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:25
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/84; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
BIS (4-B-HYDROXYETHOXYPHENYL) KETONES HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
BIS (4-B-HYDROXYETHOXYPHENYL) KETONES HAVING THE FORMULA:
References Cited (Backward Citations)
US2331265A
Cited
US2592560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |