US4019919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full strength, low density concrete
Assignee: Individual
•
Filing: 1976-03-23
•
Granted: 1977-04-26
•
Expires: 1996-03-23
Abstract
Abstract A full strength, low density concrete is disclosed. The concrete utilizes polyethylene particles for some or all of the aggregate. The particles have a roughened, greatly uneven surface with extreme variations in contour on a macro scale.
Inventors
- 👤 Joseph L. DeSalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; Y; Y10; Y10S; Y10S264/00; Y10S264/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A high strength concrete composition, said concrete having a binder phase of cement, and an aggregate phase made up at least in part of polyethylene particles, said polyethylene particles having substantially roughened and greatly uneven surfaces with extreme variations in contour thereof on a macro scale, said concrete having an average composition strength of at least 2700 lbs. per square inch, said concrete including said polyethylene particles being substantially free of entrained gas.
Claim 2
Dependent Claim
73 words
A high strength concrete composition, said concrete having a binder phase of cement, and an aggregate phase made up at least in part of polyethylene particles, said polyethylene particles having substantially roughened and greatly uneven surfaces with extreme variations in contour thereof on a macro scale, said concrete having an average composition strength of at least 2700 lbs. per square inch, said concrete including said polyethylene particles being substantially free of entrained gas.
Claim 3
Dependent Claim
15 words
The composition of clain 1 wherein the polyethylene particles comprise substantially the entire aggregate phase.
Claim 4
Dependent Claim
15 words
The composition of clain 1 wherein the polyethylene particles comprise substantially the entire aggregate phase.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |