US2858284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-caking flatting agent for varnishes
Assignee: WR Grace and Co
•
Filing: 1955-04-11
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Granted: 1958-10-28
•
Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth G Acker
- 👤 Luther O Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FLATTING AGENT ESPECIALLY SUITABLE FOR USE IN VARNISH FORMULATIONS CHARACTERIZED BY A REDUCE TENDENCY TO SETTLE ON STANDING AND AN IMPROVED RESISTANCE TO COMMINUTION DURING MILLING OF THE GEL INTO THE VARNISH BASE WITH CONCOMITANT LOSS OF FLATTING POWER, SAID FLATTING AGENT COMPRISING A COMMINUTED SILICA XEROGEL HAVING ADSORBED THEREON ABOUT 45-60 PERCENT OF A PRIMARY MONOHYDRIC ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS.
Claim 2
Dependent Claim
66 words
A FLATTING AGENT ESPECIALLY SUITABLE FOR USE IN VARNISH FORMULATIONS CHARACTERIZED BY A REDUCE TENDENCY TO SETTLE ON STANDING AND AN IMPROVED RESISTANCE TO COMMINUTION DURING MILLING OF THE GEL INTO THE VARNISH BASE WITH CONCOMITANT LOSS OF FLATTING POWER, SAID FLATTING AGENT COMPRISING A COMMINUTED SILICA XEROGEL HAVING ADSORBED THEREON ABOUT 45-60 PERCENT OF A PRIMARY MONOHYDRIC ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS.
References Cited (Backward Citations)
US2180145A
Cited
US2396051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |