US3811905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aggregate for road construction and method for the production of said aggregate
Assignee: Individual
•
Filing: 1972-06-14
•
Granted: 1974-05-21
•
Expires: 1992-06-14
Abstract
Abstract An aggregate material for road construction comprising sharpedged hard particles bonded to the surface of the particles of a basic aggregate by a binder.
Inventors
- 👤 K Kroyer
- 👤 T Fredsted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:27
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/085; C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
An aggregate as in claim 1, characterized in that the hard particles are of a particle size of below 0.5 mm.
Claim 2
Dependent Claim
44 words
adding hard particles of a material selected from the group consisting of quartz, corundum, silicon carbide, calcined bauxite, devitrified glass and mixtures of two or more of the foregoing to the coated basic aggregate particles to embed the hard particles in said coating and
Claim 3
Dependent Claim
17 words
curing the binder to firmly bond the hard particles to the surface of said basic aggregate particles.
Claim 4
Dependent Claim
22 words
An aggregate as in claim 1, characterized in that said basic aggregate particles have particle sizes of between 2 and 20 mm.
Claim 5
Dependent Claim
24 words
An aggregate as in claim 1, characterized in that the hard particles are bonded to the surface of the basic aggregate by a binder.
Claim 6
Dependent Claim
13 words
An aggregate as in claim 4, characterized in that the binder is waterglass.
Claim 7
Dependent Claim
16 words
A method for the production of the aggregate of claim 1, characterized by the steps of
Claim 8
Dependent Claim
33 words
A method as in claim 6, characterized in using a waterglass solution as binder and in firing the coated basic aggregate particles having hard particles embedded in said coating to cure the binder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |