US3689305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for sealing mortar-coated pipe
Assignee: American Pipe and Construction Co
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Filing: 1969-06-19
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Granted: 1972-09-05
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Expires: 1989-06-19
Abstract
Abstract A CORROSION-PREVENTING SEALER COATING CAN BE APPLIED TO MORTAR-COATED PIPE WITHOUT WAITING FOR THE MORTOR TO CURE IF THE SEALER IS A LIQUID, ESSENTIALLY SOLVENT-FREE MATERIAL OF THE PROPER FLOW CHARACTERISTICS TO FROM A SUBSTANTIALLY PINHOLE-FREE, CONTINUOUS LAYER OVER THE IRREGULARITIES OF THE ROUGH MORTAR SURFACE, AND CURES AT ROOM TEMPERATURE INTO A HARD, MOISTURE-IMPREVIOUS COATING BY THE USE OF A WATER-COMPATIBLE, NON-ACID CURING AGENT. A PIGMENTED AND THICKENED SUBSTANTIALLY SOLVENT-FREE EQPXY RESIN COMPOSITION CURED BY AN ACCELERATED AMIDO-AMINE CURING AGENT IS DESCRIBED AS AN EXAMPLE OF A COATING SYSTEM WHICH SATISFIES THE ABOVE REQUIREMENTS.
Inventors
- 👤 Delbert A Hausmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4853; C04B41/60; C04B41/61; C04B41/62; C04B41/63; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1072
Claims Analysis
Total Claims: 0
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |