US3073708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road construction materials
Assignee: Individual
•
Filing: 1958-08-25
•
Granted: 1963-01-15
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Kroyer Karl Kristian Kobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:10
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; C; C03; C03B; C03B19/00; C03B19/10; C03B19/1005; C03B19/1045; C03B19/109; C03C; C03C10/00; C03C10/0009; E01C7/00; E01C7/08; E01C7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A NON-BRITTLE, WATER-RESISTANT AGGREGATE FOR ROAD CONSTRUCTION MATERIAL CONSISTING ESSENTIALLY OF GRAINS OF DEVITRIFIED GLASS THE ANALYSIS OF WHICH SHOWS A CONTENT OF MORE THAN 60 PERCENT SIO2 AND MORE THAN 20 PERCENT CAO, THE TOTAL OF SAID SIO2 AND CAO EQUALLING AT LEAST ABOUT 90 PERCENT, SAID AGGREGATE BEING ADAPTED TO IMPART A LIGHT-REFLECTIVE, GLARE-FREE SURFACE TO ROADS CONTAINING THE SAME.
Claim 2
Dependent Claim
62 words
A NON-BRITTLE, WATER-RESISTANT AGGREGATE FOR ROAD CONSTRUCTION MATERIAL CONSISTING ESSENTIALLY OF GRAINS OF DEVITRIFIED GLASS THE ANALYSIS OF WHICH SHOWS A CONTENT OF MORE THAN 60 PERCENT SIO2 AND MORE THAN 20 PERCENT CAO, THE TOTAL OF SAID SIO2 AND CAO EQUALLING AT LEAST ABOUT 90 PERCENT, SAID AGGREGATE BEING ADAPTED TO IMPART A LIGHT-REFLECTIVE, GLARE-FREE SURFACE TO ROADS CONTAINING THE SAME.
References Cited (Backward Citations)
US225991A
Cited
US1143885A
Cited
US1842772A
Cited
US2635054A
Cited
US2889952A
Cited
US2920971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |