Patent US2522668A successfully refreshed from Google Patents.
US2522668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resins prepared from ketone condensation products
Assignee: Wyeth Holdings LLC
•
Filing: 1946-10-16
•
Granted: 1950-09-19
•
Expires: 1966-10-16
Abstract
No abstract record available.
Inventors
- 👤 James R Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:24
CPC Classifications
C; C08; C08G; C08G12/00; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A WATER-INSOLUBLE, GRANULAR, ANION EXCHANGE SYNTHETIC RESINOUS MATERIAL OBTAINED BY A PROCESS INCLUDING THE STEP OF HEATING TOGETHER AT LEAST ONE ALDEHYDE, A MEMBER OF THE GROUP CONSISTING OF UREA, DIAMINOTRIAZINES AND TRIAMINOTRIAZINES HAVING A HYDROGEN ATOM ATTACHED TO EACH AMINO NITROGEN ATOM, AND THE ORGANIC MONOMERIC HEAT CONDENSATION PRODUCT OF A KETONE WITH A MEMBER OF THE GROUP CONSISTING OF BIGUANIDE, MONOMONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDE, DI-MONOVALENT HYDROCARBONAND FURFURYL-SUBSTITUTED BIGUANIDES, GUANIDINE, MONO-MONOVALENT HYDROCARBON- AND FURFURYLSUBSTITUTED GUANIDINES, DI-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, AND THEIR SALTS, THE MOLAR COMBINED RATIO OF SAID KETONE TO SAID MEMBER IN SAID CONDENSATION PRODUCT BEING FROM 1:1 TO 2:1.
Claim 2
Dependent Claim
104 words
A WATER-INSOLUBLE, GRANULAR, ANION EXCHANGE SYNTHETIC RESINOUS MATERIAL OBTAINED BY A PROCESS INCLUDING THE STEP OF HEATING TOGETHER AT LEAST ONE ALDEHYDE, A MEMBER OF THE GROUP CONSISTING OF UREA, DIAMINOTRIAZINES AND TRIAMINOTRIAZINES HAVING A HYDROGEN ATOM ATTACHED TO EACH AMINO NITROGEN ATOM, AND THE ORGANIC MONOMERIC HEAT CONDENSATION PRODUCT OF A KETONE WITH A MEMBER OF THE GROUP CONSISTING OF BIGUANIDE, MONOMONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDE, DI-MONOVALENT HYDROCARBONAND FURFURYL-SUBSTITUTED BIGUANIDES, GUANIDINE, MONO-MONOVALENT HYDROCARBON- AND FURFURYLSUBSTITUTED GUANIDINES, DI-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, AND THEIR SALTS, THE MOLAR COMBINED RATIO OF SAID KETONE TO SAID MEMBER IN SAID CONDENSATION PRODUCT BEING FROM 1:1 TO 2:1.
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |