Patent US2517824A successfully refreshed from Google Patents.
US2517824A
Expired / Lapsed
US
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Resinous products derived from condensation products of cycloaliphatic ketones with guanidines, dicyandiamide, or biguanides
Assignee: Wyeth Holdings LLC
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Filing: 1946-10-16
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Granted: 1950-08-08
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Expires: 1966-10-16
Abstract
No abstract record available.
Inventors
- 👤 Andren J Appelquest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
C; C08; C08G; C08G12/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A FORMALDEHYDE CONDENSATION PRODUCT OF THE ORGANIC HEAT CONDENSATION PRODUCT OF DICYANDIAMIDE WITH A CYCLOALIPHATIC KETONE SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXANONE, CYCLOHEXYLIDENE CYCLOHEXANONE, AND CYCLOPENTANONE IN A MOLAR RATION OF 1:1 TO 1:2, DICYANDIAMIDE TO KETONE.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |