US3210207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-corrosive accelerator for setting of cements
Assignee: WR Grace and Co
•
Filing: 1964-08-24
•
Granted: 1965-10-05
•
Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Vance H Dodson
- 👤 Arnold M Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:47
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A CEMENTING COMPOSITION CONSISTING ESSENTIALLY OF PORTLAND CEMENT AND BETWEEN ABOUT 0.2 TO 5.0% BY WEIGHT OF THE CEMENT OF AN ADDITIVE CONSISTING OF A MAJOR AMOUNT OF CALCIUM FORMATE IN ADMIXTURE WITH UP TO ABOUT 5% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BENZOIC ACID AND THE ALKALI METAL, ALKALINE EARTH METAL, AND AMMONIUM SALTS OF CHROMIC ACID, BENZOIC ACID, AND NITROUS ACID.
Claim 2
Dependent Claim
68 words
A CEMENTING COMPOSITION CONSISTING ESSENTIALLY OF PORTLAND CEMENT AND BETWEEN ABOUT 0.2 TO 5.0% BY WEIGHT OF THE CEMENT OF AN ADDITIVE CONSISTING OF A MAJOR AMOUNT OF CALCIUM FORMATE IN ADMIXTURE WITH UP TO ABOUT 5% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BENZOIC ACID AND THE ALKALI METAL, ALKALINE EARTH METAL, AND AMMONIUM SALTS OF CHROMIC ACID, BENZOIC ACID, AND NITROUS ACID.
References Cited (Backward Citations)
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US2860060A
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US2880102A
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US2859146A
Cited
US2776917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |