Patent US2898232A successfully refreshed from Google Patents.
US2898232A
Expired / Lapsed
US
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Roofing granules and method for making
Assignee: 3M Co
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Filing: 1956-06-14
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Granted: 1959-08-04
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Expires: 1976-06-14
Abstract
No abstract record available.
Inventors
- 👤 Robert M Miller
- 👤 James R Lodge
- 👤 Merle C Merwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:46
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS FOR MAKING COLOR COATED GRAMULES OF HIGH COLOR INTENSITY, RESISTANCE TO BLOOMING AND WEATHERING, AND ADHESION TO ASPHASLT, THE STEPS OF ABSORBING IN A PARTICULATE, ABSORPTIVE, CELLULOSIC ORGANIC MATERIAL OF LOWDENSITY A MAJOR PROPORTION OF WATER-DISSOLVED WATERSOLUBLE PRODUCTS FORMED AS A RESULT TREATING A DRY, DENSE, PIGMENT-CONTAINING, ALKALI-SILICATE COATING ON MINERAL GRANULES WITH A WATER-SOLUTION OF AN ALKLI-REACTIVE, ACIDE PICKING COMPOUND, SAID PARTICULATE MATERIAL BEING ADMIXED WITH SAID GRANULES, AND DIRECTING A STREAM OF AIR THROUGH SAID GRANULES AND ADMIXED PARTICLES MATERIAL WHILE AGITATING BOTH SAID GRANULES AND SAID ADMIXED PARTICULATE MATERIAL SO AS TO REMOVE SAID PARTICULATE MATERIAL AND ABSORBED CONSTITUENTS FROM SAID GRANULES.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR MAKING COLOR COATED GRAMULES OF HIGH COLOR INTENSITY, RESISTANCE TO BLOOMING AND WEATHERING, AND ADHESION TO ASPHASLT, THE STEPS OF ABSORBING IN A PARTICULATE, ABSORPTIVE, CELLULOSIC ORGANIC MATERIAL OF LOWDENSITY A MAJOR PROPORTION OF WATER-DISSOLVED WATERSOLUBLE PRODUCTS FORMED AS A RESULT TREATING A DRY, DENSE, PIGMENT-CONTAINING, ALKALI-SILICATE COATING ON MINERAL GRANULES WITH A WATER-SOLUTION OF AN ALKLI-REACTIVE, ACIDE PICKING COMPOUND, SAID PARTICULATE MATERIAL BEING ADMIXED WITH SAID GRANULES, AND DIRECTING A STREAM OF AIR THROUGH SAID GRANULES AND ADMIXED PARTICLES MATERIAL WHILE AGITATING BOTH SAID GRANULES AND SAID ADMIXED PARTICULATE MATERIAL SO AS TO REMOVE SAID PARTICULATE MATERIAL AND ABSORBED CONSTITUENTS FROM SAID GRANULES.
References Cited (Backward Citations)
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |