US2914579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xylene-formaldehyde condensation products
Assignee: Honeywell International Inc
•
Filing: 1956-12-14
•
Granted: 1959-11-24
•
Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 Walter J Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:05
CPC Classifications
C; C08; C08G; C08G10/00; C08G10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A LIQUID XYLENE-FORMALDEHYDE-METHANOL REACTION PRODUCT ADAPTED FOR USE AS A PLASTICIZER HAVING A VISCOSITY OF 100-1500 CENTIPOISES, A MOLECULAR WEIGHT OF ABOUT 250-300 AND A COLOR OF BELOW 100 HAZEN, PRODUCED BY HEATING TO A TEMPERATURE OF ABOUT 95-125* C., A MIXTURE OF ORTHO XYLENE, META XYLENE AND PARA XYLENE CONTAINING AT LEAST 53% META XYLENE BY WEIGHT OF THE TOTAL AMOUNT OF XYLENES IN THE MIXTURE AND FORMALDEHYDE IN THE PROPORTION OF FROM 1 TO 4 MOLS XYLENE TO 1 MOL FORMALDEHYDE WITH SUFFICIENT META XYLENE IN SAID MIXTURE TO PROVIDE AT LEAST 1 MOL OF METAL XYLENE PER MOL OF FORMALDEHYDE AND ABOUT 5-15% METHANOL BY WEIGHT OF THE FORMALDEHYDE IN THE PRESENCE OF DILUTE SULFURIC ACID CATALYST OF CONCENTRATION BETWEEN 25-40% H2SO4 FOR SUFFICIENT LENGTH OF TIME TO EFFECT SELECTIVE CONDENSATION OF THE FORMALDEHYDE WITH METAL XYLENE AND TERMINATING THE REACTION BEFORE 70% OF THE TOTAL XYLENE IN THE REACTION MIXTURE HAVE CONDENSED.
Claim 2
Dependent Claim
156 words
A LIQUID XYLENE-FORMALDEHYDE-METHANOL REACTION PRODUCT ADAPTED FOR USE AS A PLASTICIZER HAVING A VISCOSITY OF 100-1500 CENTIPOISES, A MOLECULAR WEIGHT OF ABOUT 250-300 AND A COLOR OF BELOW 100 HAZEN, PRODUCED BY HEATING TO A TEMPERATURE OF ABOUT 95-125* C., A MIXTURE OF ORTHO XYLENE, META XYLENE AND PARA XYLENE CONTAINING AT LEAST 53% META XYLENE BY WEIGHT OF THE TOTAL AMOUNT OF XYLENES IN THE MIXTURE AND FORMALDEHYDE IN THE PROPORTION OF FROM 1 TO 4 MOLS XYLENE TO 1 MOL FORMALDEHYDE WITH SUFFICIENT META XYLENE IN SAID MIXTURE TO PROVIDE AT LEAST 1 MOL OF METAL XYLENE PER MOL OF FORMALDEHYDE AND ABOUT 5-15% METHANOL BY WEIGHT OF THE FORMALDEHYDE IN THE PRESENCE OF DILUTE SULFURIC ACID CATALYST OF CONCENTRATION BETWEEN 25-40% H2SO4 FOR SUFFICIENT LENGTH OF TIME TO EFFECT SELECTIVE CONDENSATION OF THE FORMALDEHYDE WITH METAL XYLENE AND TERMINATING THE REACTION BEFORE 70% OF THE TOTAL XYLENE IN THE REACTION MIXTURE HAVE CONDENSED.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |