US2621165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol phthalaldehyde resins and process of preparing same
Assignee: California Research LLC
•
Filing: 1949-05-23
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Granted: 1952-12-09
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Expires: 1969-05-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:46
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A SYNTHETIC RESIN CONSISTING OF THE REACTION PRODUCT OBTAINED BY CONDENSING A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, POLYHYDRIC PHENOLS, ALKYL SUBSTITUTED PHENOLS, AND MIXTURES THEREOF, WITH A BENZENE DIALDEHYDE.
Claim 2
Dependent Claim
32 words
A SYNTHETIC RESIN CONSISTING OF THE REACTION PRODUCT OBTAINED BY CONDENSING A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, POLYHYDRIC PHENOLS, ALKYL SUBSTITUTED PHENOLS, AND MIXTURES THEREOF, WITH A BENZENE DIALDEHYDE.
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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |