Patent US3116264A successfully refreshed from Google Patents.
US3116264A
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Cement composition containing a copolymer of maleic anhydride and certain vinyl hetero-nu-cyclic compounds and method of cementing a well therewith
Assignee: Dow Chemical Co
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Filing: 1960-05-09
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Granted: 1963-12-31
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Expires: 1980-05-09
Abstract
No abstract record available.
Inventors
- 👤 Winton W Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:13
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A CEMENTING COMPOSITION CONSISTING ESSENTIALLY OF WATER, AN HYDRAULIC CEMENT SELECTED FROM THE CLASS CONSISTING OF PORTLAND AND ALUMINOUS CEMENTS, AND BETWEEN 0.05 AND 1.5 PERCENT BASED ON THE WEIGHT OF THE DRY HYDRAULIC CEMENT USED OF A COPOLYMER OF MALEIC ANHYDRIDE AND A VINYL NITROGEN-CONTAINING RING COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-VINYLMORPHOLINONE, N-VINYL PYRROLIDONE, N-VINYL-2-OXAZINIDINONE, N-VINYL-2-OXAZOLIDINONE, AND RING-SUBSTITUTED ALKYL DERIVATIVES THEREOF WHEREIN THE ALKYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF METHYL AND ETHYL GROUPS.
Claim 2
Dependent Claim
79 words
A CEMENTING COMPOSITION CONSISTING ESSENTIALLY OF WATER, AN HYDRAULIC CEMENT SELECTED FROM THE CLASS CONSISTING OF PORTLAND AND ALUMINOUS CEMENTS, AND BETWEEN 0.05 AND 1.5 PERCENT BASED ON THE WEIGHT OF THE DRY HYDRAULIC CEMENT USED OF A COPOLYMER OF MALEIC ANHYDRIDE AND A VINYL NITROGEN-CONTAINING RING COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-VINYLMORPHOLINONE, N-VINYL PYRROLIDONE, N-VINYL-2-OXAZINIDINONE, N-VINYL-2-OXAZOLIDINONE, AND RING-SUBSTITUTED ALKYL DERIVATIVES THEREOF WHEREIN THE ALKYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF METHYL AND ETHYL GROUPS.
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |