US3746725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble carbamoyl polymer compositions used as cements
Assignee: Dow Chemical Co
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Filing: 1971-07-12
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Granted: 1973-07-17
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Expires: 1991-07-12
Abstract
Abstract THE SEALING OF VOID SPACES, E.G. AS IN GEOLIGICAL FORMATIONS AND/OR BETWEEN METAL SHAPES IS ACCOMPLISHED WITH A LIQUID SLURRY OF A PARTICULATE, WATER-SOLUBLE ORGANIC POLYMER IN AN ORGANO SOLVENT. THE MIXTURE OF THE POLYMER AND SOLVENT HAS A CONTROLLED SET TIME TO ALLOW THE EMPLACEMENT OF THE SLURRY AS A LIQUID. THE SLURRY THEN SETS TO FORM A SEALING CEMENTITIOUS MATERIAL.
Inventors
- 👤 L Eilers
- 👤 C Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:48
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/20; C09K17/22; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C09K8/00; C09K8/42; C09K8/44; C09K8/50; C09K8/504; C09K8/506; C09K8/508
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |