US3788869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete compositions or mixes and additive therefor
Assignee: Hercules LLC
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Filing: 1972-01-11
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Granted: 1974-01-29
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Expires: 1992-01-11
Abstract
Abstract DISCLOSED ARE HYDROXYETHYL CELLULOSE (HEC) AS ADDITIVE FOR CONCRETE COMPOSITIONS OR MIXES, SUBSTANTIALLY DRY CONCRETE COMPOSITIONS COMPRISING CONVENTIONAL INGREDIENTS PLUS HEC, AND CONCRETE COMPOSITIONS COMPRISING CONVENTIONAL INGREDIENTS (INCLUDING WATER) PLUS HEC. THE HEC RENDERS THE CONCRETE COMPOSITIONS (WHEN WATER IS ADDED THERETO) READILY PUMPABLE AND GIVES PERCENT TOTAL AIR VALUES WITHIN AMERICAN CONCRETE INSTITUTE SPECIFICATIONS.
Inventors
- 👤 J Batdorf
- 👤 S Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:45
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |