US2934455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coloring coarse aggregate
Assignee: 3M Co
•
Filing: 1956-02-02
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Granted: 1960-04-26
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 George J Dober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:40
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PROCESS OF PRODUCING ARTIFICIALLY COLORED AGGREGATE INCLUDING UNIFORMLY COLOR-COATED COARSED AGGREGATE, THE STEPS COMPRISING: MIXING A MASS OF AGGREGATE INCLUDING A FIRST QUANTITY OF COARSE AGGREGATE THE PARTICLES OF WHICH HAVE A SCREEN SIZE OF FROM ABOUT 1/4 INCH TO ABOUT 4 INCHES, AND AT LEAST AN EQUAL AMOUNT BY WEIGHT OF A SECOND QUANTITY OF FINER AGGREGATE THE PARTICLES OF WHICH HAVE A SCREEN SIZE LESS THAN THAT OF SAID FIRST QUANTITY, WITH AN AMOUNT OF BINDER AND COLORING MATERIAL AT LEAST SUFFICIENT TO PROVIDE UNIFORM COLOR-COATING OF SAID SECOND QUANTITY ALONE, THE SCREEN SIZE OF ALL THE PARTICLES OF SAID FIRST QUANTITY EXCEEDING BY AT LEAST TWOFOLD THE WEIGHT-MEDIAN SCREEN SIZE OF SAID SECOND QUANTITY, DRYING AND FIRING THE MASS, AND SEPARATING THE MASS INTO A PLURALITY OF FRACTIONS ONE OF WHICH INCLUDES THE COLOR-COATED PARTICLES OF SAID FIRST QUANTITY.
Claim 2
Dependent Claim
144 words
IN THE PROCESS OF PRODUCING ARTIFICIALLY COLORED AGGREGATE INCLUDING UNIFORMLY COLOR-COATED COARSED AGGREGATE, THE STEPS COMPRISING: MIXING A MASS OF AGGREGATE INCLUDING A FIRST QUANTITY OF COARSE AGGREGATE THE PARTICLES OF WHICH HAVE A SCREEN SIZE OF FROM ABOUT 1/4 INCH TO ABOUT 4 INCHES, AND AT LEAST AN EQUAL AMOUNT BY WEIGHT OF A SECOND QUANTITY OF FINER AGGREGATE THE PARTICLES OF WHICH HAVE A SCREEN SIZE LESS THAN THAT OF SAID FIRST QUANTITY, WITH AN AMOUNT OF BINDER AND COLORING MATERIAL AT LEAST SUFFICIENT TO PROVIDE UNIFORM COLOR-COATING OF SAID SECOND QUANTITY ALONE, THE SCREEN SIZE OF ALL THE PARTICLES OF SAID FIRST QUANTITY EXCEEDING BY AT LEAST TWOFOLD THE WEIGHT-MEDIAN SCREEN SIZE OF SAID SECOND QUANTITY, DRYING AND FIRING THE MASS, AND SEPARATING THE MASS INTO A PLURALITY OF FRACTIONS ONE OF WHICH INCLUDES THE COLOR-COATED PARTICLES OF SAID FIRST QUANTITY.
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |