Patent US2863843A successfully refreshed from Google Patents.
US2863843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film forming aqueous colloidal dispersions containing nitrogenous condensation products and process for preparing same
Assignee: Dow Chemical Co
•
Filing: 1955-10-27
•
Granted: 1958-12-09
•
Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Charles R Scott
- 👤 Paul A Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:23
CPC Classifications
C; C09; C09D; C09D157/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN AQUEOUS COLLOIDAL DISPERSION COMPRISING (1) A SYNTHETIC LATEX CONTAINING IN THE DISPERSE PHASE A POLYMER OBTAINED BY POLYMERIZING AN OLEFINICALLY UNSATURATED MONOMER CONTAINING IN ITS STRUCTURE AT LEAST ONE ETHYLENIC GROUP HAVING THE CH2=CH- LINKAGE WHEREIN SAID ETHYLENIC GROUP IS JOINED TO AN ATOM SELECTED FROM THE GROUP CONSISTING OF CARBON AND OXYGEN AND (2) FROM ABOUT 0.25 TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SOLIDS PRESENT IN THE SYNTHETIC LATEX OF A WATER-SOLUBLE CONDENSATION PRODUCT OF FROM 1.5 TO 3.5 MOLECULAR PROPORTIONS OF FORMALDEHYDE WITH ONE MOLECULAR PROPORTION OF AN ALIPHATIC POLYAMINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
101 words
AN AQUEOUS COLLOIDAL DISPERSION COMPRISING (1) A SYNTHETIC LATEX CONTAINING IN THE DISPERSE PHASE A POLYMER OBTAINED BY POLYMERIZING AN OLEFINICALLY UNSATURATED MONOMER CONTAINING IN ITS STRUCTURE AT LEAST ONE ETHYLENIC GROUP HAVING THE CH2=CH- LINKAGE WHEREIN SAID ETHYLENIC GROUP IS JOINED TO AN ATOM SELECTED FROM THE GROUP CONSISTING OF CARBON AND OXYGEN AND (2) FROM ABOUT 0.25 TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SOLIDS PRESENT IN THE SYNTHETIC LATEX OF A WATER-SOLUBLE CONDENSATION PRODUCT OF FROM 1.5 TO 3.5 MOLECULAR PROPORTIONS OF FORMALDEHYDE WITH ONE MOLECULAR PROPORTION OF AN ALIPHATIC POLYAMINE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
CA456572A
Cited
US2390153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |