US2512671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hemi-formalization products of urea-formaldehyde resinous condensates
Assignee: Hexion Inc
•
Filing: 1945-08-08
•
Granted: 1950-06-27
•
Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Emil E Novotny
- 👤 Vogelsang George Karl
- 👤 Ernest E Novotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:38
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF PRODUCING SOLUBLE AND FUSIBLE HEMI-FORMALIZATION PRODUCTS OR UREA-FORMALDEHYDE RESINOUS CONDENSATES, WHICH COMPRISES THE STEPS OF REACTING A MOLE OF UREA WITH BETWEEN ABOUT 1.75 AND 2.5 MOLES OF FORMALDEHYDE IN THE PRESENCE OF WATER TO THE SOLUBLE AND FUSIBLE RESINIFIED STATE, SAID RESINIFICATION BEING CARRIED OUT IN AN ACID ENVIRONMENT TO ASSURE THE SUBSTANTIALLY COMPLETE RESINIFICATION OF THE UREA, THEN SUBSTANTIALLY NEUTRALIZING THE EXCESS ACIDITY AND CONCENTRATING THE RESINIFIED PRODUCT TO A NET WEIGHT OF BETWEEN ABOUT 2.0 AND 2.5 TIMES THE WEIGHT OF UREA CONSUMED, AND THEN ADDING BETWEEN 0.50 AND 1.5 MOLES OF FORMALDEHYDE PER MOLE OF THE AFORESAID UREA, IN A FORM ASSAYING NOT LESS THAN 25% OF FORMALDEHYDE.
Claim 2
Independent Claim
115 words
THE METHOD OF PRODUCING SOLUBLE AND FUSIBLE HEMI-FORMALIZATION PRODUCTS OR UREA-FORMALDEHYDE RESINOUS CONDENSATES, WHICH COMPRISES THE STEPS OF REACTING A MOLE OF UREA WITH BETWEEN ABOUT 1.75 AND 2.5 MOLES OF FORMALDEHYDE IN THE PRESENCE OF WATER TO THE SOLUBLE AND FUSIBLE RESINIFIED STATE, SAID RESINIFICATION BEING CARRIED OUT IN AN ACID ENVIRONMENT TO ASSURE THE SUBSTANTIALLY COMPLETE RESINIFICATION OF THE UREA, THEN SUBSTANTIALLY NEUTRALIZING THE EXCESS ACIDITY AND CONCENTRATING THE RESINIFIED PRODUCT TO A NET WEIGHT OF BETWEEN ABOUT 2.0 AND 2.5 TIMES THE WEIGHT OF UREA CONSUMED, AND THEN ADDING BETWEEN 0.50 AND 1.5 MOLES OF FORMALDEHYDE PER MOLE OF THE AFORESAID UREA, IN A FORM ASSAYING NOT LESS THAN 25% OF FORMALDEHYDE.
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) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |