US3133729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pumping concrete containing porous aggregates
Assignee: Individual
•
Filing: 1962-06-11
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Granted: 1964-05-19
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert J Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:39
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/16; B28C7/162; B28C7/163; B28C7/165
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A METHOD OF PUMPING CONCRETE CONTAINING A POROUS LIGHTWEIGHT AGGREGATE HAVING INTERIOR VOIDS COMPRISING THE STEPS OF MIXING AN INCOMPRESSIBLE FLUID WITH SAID AGGREGATE, SUBJECTING THE AGGREAGE AND FLUID TO A VACUUM WHEREBY GASES IN THE INTERIOR VOIDS OF SAID AGGREGATES ARE EVACUATED AND SAID GASES ARE REPLACED WITH SAID FLUID, AND THEREAFTER COMBINING AND MIXING SAID AGGREGATE WITH SAND, CEMENT AND MIXING WATER AND THEN APPLYING A PRESSURE HEAD TO PROPEL THE MIX.
References Cited (Backward Citations)
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Cited
US886768A
Cited
US2167156A
Cited
US2557386A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |