US2541005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resins prepared from aldehyde condensation products
Assignee: Wyeth Holdings LLC
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Filing: 1946-10-16
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Granted: 1951-02-06
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Expires: 1966-10-16
Abstract
No abstract record available.
Inventors
- 👤 Wilbur N Oldham
- 👤 James R Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; Y; Y10; Y10S; Y10S260/00; Y10S260/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A WATER-INSOLUBLE, GRANULAR, ANION EXCHANGE SYNTHETIC RESINOUS MATERIAL OBTAINED BY A PROCESS INCLUDING THE STEP OF HEATING TOGETHER FORMALDEHYDE, A MEMBER OF THE GROUP CONSISTING OF UREA, DIAMINO- AND TRIAMONIO-TRIAZINES HAVING A HYDROGEN ATOM ATTACHED TO EACH AMINO NITROGEN ATOM, AND THE MONOMERIC HEAT CONDENSATION PRODUCT OF AN ALDEHYDE CONTAINING FROM TWO TO TEN CARBON ATOMS WITH A MEMBER OF THE GROUP CONSISTING OF BIGUANIDE, MONO-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDES, DIMONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDES, GUANIDINE, MONO-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, DI-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, AND THEIR SALTS, RELATIVE MOLAR PROPORTIONS OF SAID ALDEHYDE TO SAID MEMBER IN SAID CONDENSATION PRODUCT BEING FROM 1:1 TO 2:1.
Claim 2
Dependent Claim
107 words
A WATER-INSOLUBLE, GRANULAR, ANION EXCHANGE SYNTHETIC RESINOUS MATERIAL OBTAINED BY A PROCESS INCLUDING THE STEP OF HEATING TOGETHER FORMALDEHYDE, A MEMBER OF THE GROUP CONSISTING OF UREA, DIAMINO- AND TRIAMONIO-TRIAZINES HAVING A HYDROGEN ATOM ATTACHED TO EACH AMINO NITROGEN ATOM, AND THE MONOMERIC HEAT CONDENSATION PRODUCT OF AN ALDEHYDE CONTAINING FROM TWO TO TEN CARBON ATOMS WITH A MEMBER OF THE GROUP CONSISTING OF BIGUANIDE, MONO-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDES, DIMONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED BIGUANIDES, GUANIDINE, MONO-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, DI-MONOVALENT HYDROCARBON- AND FURFURYL-SUBSTITUTED GUANIDINES, AND THEIR SALTS, RELATIVE MOLAR PROPORTIONS OF SAID ALDEHYDE TO SAID MEMBER IN SAID CONDENSATION PRODUCT BEING FROM 1:1 TO 2:1.
References Cited (Backward Citations)
US2373549A
Cited
US2373547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |