Patent US2557922A successfully refreshed from Google Patents.
US2557922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of a novolak resin and an amino diphenyl-formaldehyde compound
Assignee: Union Carbide Corp
•
Filing: 1945-03-07
•
Granted: 1951-06-26
•
Expires: 1965-03-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Mazzucchelli
- 👤 Paul F Urich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:35
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS OF PREPARING A RESINOUS PRODUCT WHICH COMPRISES CONDENSING A MOLE OF A DIPHENYL COMPOUND FROM THE CLASS CONSISTING OF DIPHENYLS AND DIPHENYL-METHANES HAVING FROM ONE TO TWO PRIMARY AMINO RADICALS AS THE SOLE REACTIVE SUBSTITUENTS ON THE PHENYL NUCLEI WITH FROM 0.75 TO 1.0 MOLE OF FORMALDEHYDE PR AMINO RADICAL, AND INCORPORATING WITH SAID CONDENSATE PRODUCT AN ACID-CATALYZED NOVOLAK RESIN OF PHENOL PER SE AND FORMALDEHYDE, THE PROPORTION OF CONDENSATION PRODUCT TO NOVOLAK RESIN BEING BETWEEN 10 PER CENT AND 200 PER CENT ON THE WEIGHT OF THE NOVOLAK RESIN.
Claim 2
Dependent Claim
91 words
PROCESS OF PREPARING A RESINOUS PRODUCT WHICH COMPRISES CONDENSING A MOLE OF A DIPHENYL COMPOUND FROM THE CLASS CONSISTING OF DIPHENYLS AND DIPHENYL-METHANES HAVING FROM ONE TO TWO PRIMARY AMINO RADICALS AS THE SOLE REACTIVE SUBSTITUENTS ON THE PHENYL NUCLEI WITH FROM 0.75 TO 1.0 MOLE OF FORMALDEHYDE PR AMINO RADICAL, AND INCORPORATING WITH SAID CONDENSATE PRODUCT AN ACID-CATALYZED NOVOLAK RESIN OF PHENOL PER SE AND FORMALDEHYDE, THE PROPORTION OF CONDENSATION PRODUCT TO NOVOLAK RESIN BEING BETWEEN 10 PER CENT AND 200 PER CENT ON THE WEIGHT OF THE NOVOLAK RESIN.
References Cited (Backward Citations)
US1429267A
Cited
US1228428A
Cited
US1591688A
Cited
US1982486A
Cited
US2014953A
Cited
GB401535A
Cited
US2178536A
Cited
US2432544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |