US3102108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea-formaldehyde pharmaceutical compositions
Assignee: Ed Geistlich Soehne AG fuer Chemische Industrie
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Filing: 1959-10-19
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Granted: 1963-08-27
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Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Aebi Albert
- 👤 Giger Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:13
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/30; A61K47/34; C; C07; C07D; C07D499/00; C07D499/21; C07D499/44; C07D499/48; C07D499/58; C07D499/64; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PRODUCTION OF A BACTERIDAL UREAFORMALDEHYDE CONDENSATION PRODUCT COMPRISNG CONDENSING UREA WITH FORMALDEHYDE IN THE PROPORTION OF 2-3 MOLS OF FORMALDEHYDE FOR EACH MOL OF UREA IN AQUEOUS SOLUTION AT A PH BETWEEN 3 AND 4 TO FORM A SOLUTION OF A WATER-SOLUBLE PRE-CONDENSATE, ADJUSTING THE PH OF SUCH SOLUTION TO A PH GRATER THAN 7, ADDING A FURTHER QUANTITY OF UREA DUFFICIENT TO BRING THE OVERALL RATIO OF FIRMALDEHYDE TO UREA TO BETWEEN 1.25 AND 2.0 AND SPRAY-DRYING THE RESULTANT MIXTURE IN AN ATOMSPHERE MAINTAINED AT A TEMPERATURE OF 180*-200*C. TO FORM SAID PRODUCT HAVING A SOLUBILITY IN WATER AT 20*C. OF 0.05-0.5% WEIGHT VOLUME.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PRODUCTION OF A BACTERIDAL UREAFORMALDEHYDE CONDENSATION PRODUCT COMPRISNG CONDENSING UREA WITH FORMALDEHYDE IN THE PROPORTION OF 2-3 MOLS OF FORMALDEHYDE FOR EACH MOL OF UREA IN AQUEOUS SOLUTION AT A PH BETWEEN 3 AND 4 TO FORM A SOLUTION OF A WATER-SOLUBLE PRE-CONDENSATE, ADJUSTING THE PH OF SUCH SOLUTION TO A PH GRATER THAN 7, ADDING A FURTHER QUANTITY OF UREA DUFFICIENT TO BRING THE OVERALL RATIO OF FIRMALDEHYDE TO UREA TO BETWEEN 1.25 AND 2.0 AND SPRAY-DRYING THE RESULTANT MIXTURE IN AN ATOMSPHERE MAINTAINED AT A TEMPERATURE OF 180*-200*C. TO FORM SAID PRODUCT HAVING A SOLUBILITY IN WATER AT 20*C. OF 0.05-0.5% WEIGHT VOLUME.
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |