US3021291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of concrete containing expanded polymeric particles
Assignee: Beazer East Inc
•
Filing: 1958-12-15
•
Granted: 1962-02-13
•
Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Thiessen Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:52
CPC Classifications
C; C04; C04B; C04B38/00; C04B16/00; C04B16/04; C04B16/08; C04B28/00; C04B28/02; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10S264/17; Y10S264/63
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A METHOD OF PRODUCING CELLULAR CONCRETE PRODUCTS OF DESIRED SHAPE WHICH COMPRISES INCORPORATING INTO A CONCRETE MIXTURE HAVING THEREIN A POROSITY PRODUCING AGENT EXPANDABLE POLYSTYRENE IN THE FORM OF SMALL PARTICLES, SAID POLYSTYRENE HAVING A HYDROCARBON EXPANDING AGENT INCORPORATED THEREIN AND BEING IN AN AMOUNT TO FILL THE PORES PRODUCED BY THE POROSITY PRODUCING AGENT, CASTING SAID CONCRETE MIXTURE TO THE DESIRED SHAPE, PERMITTING SUFFICIENT SET OF SAID CONCRETE MIXTURE FOR SAID POROSITY PRODUCING AGENT TO ACT TO PRODUCE VOIDS AND STEAM CURING SAID CASTING WHEREBY SAID POLYSTYRENE EXPANDS UNDER THE INFLUENCE OF HEAT TO FILL SAID PORES AND THEREBY PREVENT THE ABSORPTION OR TRANSMISSION OF WATER THROUGH THE CONCRETE.
References Cited (Backward Citations)
US1899137A
Cited
US2133245A
Cited
US2205735A
Cited
US2491487A
Cited
US2496895A
Cited
US2744291A
Cited
US2797201A
Cited
US2793129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |