US3583172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic cooling of concrete
Assignee: Union Carbide Corp
•
Filing: 1969-06-30
•
Granted: 1971-06-08
•
Expires: 1989-06-30
Abstract
Abstract A concrete mixture may be cooled to any desired temperature range specification prior to pouring, by spraying or injecting a cryogenic liquid, such as liquid nitrogen, directly onto or into the concrete mixture while it is being mixed in a conventional rotating mixer.
Inventors
- 👤 Robert Edwars Koudelka
- 👤 Lawrence Lees Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/06; C04B40/0683
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
22 words
The method of claim 1 wherein said cryogenic liquid is discharged into said chamber so as to impinge onto said concrete mixture.
Claim 2
Dependent Claim
26 words
The method of claim 1 wherein said cryogenic liquid is discharged into said chamber so as to be injected under the surface of said concrete mixture.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the cryogenic liquid is liquid nitrogen.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said rotatable mixing chamber is mounted on a truck.
Claim 5
Dependent Claim
16 words
The method of claim 4 wherein said mixing chamber is rotated at 10 to 14 r.p.m.
Claim 6
Dependent Claim
31 words
The method of claim 6 wherein the amount of liquid nitrogen used is about 125 to 150 cubic feet per cubic yard of concrete per degree of cooling to be obtained.
References Cited (Backward Citations)
US2261808A
Cited
US2648206A
Cited
US2919862A
Cited
US2909433A
Cited
US3150496A
Cited
US3410065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |