US2953474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of artificially colored granules
Assignee: Minerals & Chemicals Corp America
•
Filing: 1958-03-04
•
Granted: 1960-09-20
•
Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Wheeler Peyton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR COATING A SILICEOUS MINERAL GRANULE WITH CLAY PARTICLES TO PRODUCE AN OPAQUE WATER-INSOLUBLE COATING THEREON COMPRISING DISSEMINATING ON THE SURFACE OF SAID GRANULE SODIUM SILICATE AND CLAY IN EXCESS OF THAT REACTABLE WITH SAID SODIUM SILICATE, AND FIRING SAID GRANULE AT A TEMPERATURE BELOW THAT AT WHICH SAID CLAY FUSES THEREBY TO INSOLUBILIZE SAID SODIUM SILICATE, THE IMPROVEMENT CONSISTING ESSENTIALLY OF: APPLYING TO THE SURFACE OF SAID MINERAL GRANULE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ANIONIC WETTING AGENTS AND WATER-SOLUBLE NONIONIC WETTING AGENTS, PRIOR TO DISSEMINATING SAID CLAY AND SAID SODIUM SILICATE ON THE SURFACE OF SAID GRANULE.
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR COATING A SILICEOUS MINERAL GRANULE WITH CLAY PARTICLES TO PRODUCE AN OPAQUE WATER-INSOLUBLE COATING THEREON COMPRISING DISSEMINATING ON THE SURFACE OF SAID GRANULE SODIUM SILICATE AND CLAY IN EXCESS OF THAT REACTABLE WITH SAID SODIUM SILICATE, AND FIRING SAID GRANULE AT A TEMPERATURE BELOW THAT AT WHICH SAID CLAY FUSES THEREBY TO INSOLUBILIZE SAID SODIUM SILICATE, THE IMPROVEMENT CONSISTING ESSENTIALLY OF: APPLYING TO THE SURFACE OF SAID MINERAL GRANULE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ANIONIC WETTING AGENTS AND WATER-SOLUBLE NONIONIC WETTING AGENTS, PRIOR TO DISSEMINATING SAID CLAY AND SAID SODIUM SILICATE ON THE SURFACE OF SAID GRANULE.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |