US2662071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing dicyandiamideurea-formaldehyde impregnating agents
Assignee: Individual
•
Filing: 1950-02-10
•
Granted: 1953-12-08
•
Expires: 1970-02-10
Abstract
No abstract record available.
Inventors
- 👤 Elod Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; C08G12/046; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF PREPARING STABLE IMPREGNATING AGENTS FOR FINISHING FIBROUS AND FIBER-CONTAINING MATERIALS AND ARTICLES, SAID AGENTS CONSISTING OF WATER-SOLUBLE PRECONDENSATES OF SYNTHETIC RESINS WHICH ARE STABLE ON STORAGE, AND WHICH DISSOLVE TO FORM A CRYSTALLOID DISPERSION, WHICH COMPRISES REACTING FORMALDEHYDE WITH UREA AND DICYANDIAMIDE IN THE PRESENCE OF WATER IN A SUBSTANTIALLY NUETRAL REACTION MEDIUM AT A MODERATELY ELEVATED TEMPERATURE BELOW THE BOILING POINT, THEREBY PRODUCING MIXED PRECONDENSATES WHICH ARE SOLUBLE IN WATER TO FORM A CRYSTALLOID DISPERSION, THE QUANTITY OF THE CONDENSED DICYANDIAMIDE BEING SO REGULATED THAT A SUFFICIENT AMOUNT IS PRESENT TO STABILIZE THE MIXED PRECONDENSATE, THERE BEING PRESENT NOT LESS THAN 1 PART BY WEIGHT OF DICYANDIAMIDE FOR EVERY 3 PARTS BY WEIGHT OF UREA.
Claim 2
Independent Claim
119 words
THE METHOD OF PREPARING STABLE IMPREGNATING AGENTS FOR FINISHING FIBROUS AND FIBER-CONTAINING MATERIALS AND ARTICLES, SAID AGENTS CONSISTING OF WATER-SOLUBLE PRECONDENSATES OF SYNTHETIC RESINS WHICH ARE STABLE ON STORAGE, AND WHICH DISSOLVE TO FORM A CRYSTALLOID DISPERSION, WHICH COMPRISES REACTING FORMALDEHYDE WITH UREA AND DICYANDIAMIDE IN THE PRESENCE OF WATER IN A SUBSTANTIALLY NUETRAL REACTION MEDIUM AT A MODERATELY ELEVATED TEMPERATURE BELOW THE BOILING POINT, THEREBY PRODUCING MIXED PRECONDENSATES WHICH ARE SOLUBLE IN WATER TO FORM A CRYSTALLOID DISPERSION, THE QUANTITY OF THE CONDENSED DICYANDIAMIDE BEING SO REGULATED THAT A SUFFICIENT AMOUNT IS PRESENT TO STABILIZE THE MIXED PRECONDENSATE, THERE BEING PRESENT NOT LESS THAN 1 PART BY WEIGHT OF DICYANDIAMIDE FOR EVERY 3 PARTS BY WEIGHT OF UREA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |