Patent US2898221A successfully refreshed from Google Patents.
US2898221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete of improved strength
Assignee: Dow Silicones Corp
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Filing: 1957-05-06
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Granted: 1959-08-04
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Barber C Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:48
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/40; C04B24/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD WHICH COMPRISES INCORPORATING IN A CONCRETE MIX FROM .05 TO 0.7% BY WEIGFHT BASED ON THE WEIGHT OF THE PORTLAND CEMENT IN THE CONCRETE OF AN ALKALI METAL SALT OF A MONOORGANO SILICONATE IN WHICH THE ORGANIC GROUP IS A LOWER ALIPHATIC HYDROCARBON RADICAL OF LESS THAN 4 CARBON ATOMS WHEREBY A STRUCTURAL CONCRETE OF IMPROVED COMPRESSIVE STRENGTH IS PRODUCED.
Claim 2
Independent Claim
62 words
A METHOD WHICH COMPRISES INCORPORATING IN A CONCRETE MIX FROM .05 TO 0.7% BY WEIGFHT BASED ON THE WEIGHT OF THE PORTLAND CEMENT IN THE CONCRETE OF AN ALKALI METAL SALT OF A MONOORGANO SILICONATE IN WHICH THE ORGANIC GROUP IS A LOWER ALIPHATIC HYDROCARBON RADICAL OF LESS THAN 4 CARBON ATOMS WHEREBY A STRUCTURAL CONCRETE OF IMPROVED COMPRESSIVE STRENGTH IS PRODUCED.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |