Patent US2475640A successfully refreshed from Google Patents.
Patent US3219472A successfully refreshed from Google Patents.
US3219472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating the interior surface of a porous pipe
Assignee: Johns Manville Corp
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Filing: 1961-09-29
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Granted: 1965-11-23
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Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert T Hucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/92; B28B21/94; B05; B05D; B05D7/00; B05D7/22; B05D7/222; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1036; F16L9/00; F16L9/08; F16L9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A METHOD FOR APPLYING A COATING MATERIAL TO THE INTERIOR SURFACE OF A POROUS PIPE COMPRISING: (A) HEATING A POROUS PIPE TO TEMPERATURES SUBSTANTIALLY THROUGHOUT THE PIPE GREATER THAN THE AMBIENT TEMPERATURE, (B) CASTING A COATING ON THE INTERIOR SURFACE OF SAID HEATED PIPE BY DISTRIBUTING A LIQUID RESIN COATING MATERIAL HAVING SUBSTANTIALLY THE SAME TEMPERATURE AS THE INTERIOR SURFACE OF SAID PIPE OVER THE INTERIOR SURFACE OF SAID PIPE, (C) MAINTAINING SAID COATING MATERIAL EVENLY DISPERSED OVER SAID INTERIOR SURFACE BY ROTATING SAID PIPE, AND (D) MAINTAINING SAID PIPE IN A STATE OF COOLING DURING THE APPLICATION OF SAID COATING MATERIAL AND THE CURING OF SAID COATING MATERIAL TO A POINT OF RESISTING FLOW OR SLUMPING WITH THE TEMPERATURE ADJACENT THE EXTERIOR SURFACE OF THE PIPE BEING LOWER THAN THE TEMPERATURE ADJACENT SAID INTERIOR SURFACE OF THE PIPE SO THAT THE TENDENCY FOR ANY FLOW OF GASES IN THE WALL OF SAID PIPE IS IN THE DIRECTION FROM SAID INTERIOR SURFACE TOWARD SAID EXTERIOR SURFACE OF SAID PIPE DURING THE APPLICATION OF SAID COATING MATERIAL AND THE CURING OF SAID COATING MATERIAL TO A POINT OF RESISTING FLOW OR SLUMPING.
Claim 2
Independent Claim
191 words
A METHOD FOR APPLYING A COATING MATERIAL TO THE INTERIOR SURFACE OF A POROUS PIPE COMPRISING: (A) HEATING A POROUS PIPE TO TEMPERATURES SUBSTANTIALLY THROUGHOUT THE PIPE GREATER THAN THE AMBIENT TEMPERATURE, (B) CASTING A COATING ON THE INTERIOR SURFACE OF SAID HEATED PIPE BY DISTRIBUTING A LIQUID RESIN COATING MATERIAL HAVING SUBSTANTIALLY THE SAME TEMPERATURE AS THE INTERIOR SURFACE OF SAID PIPE OVER THE INTERIOR SURFACE OF SAID PIPE, (C) MAINTAINING SAID COATING MATERIAL EVENLY DISPERSED OVER SAID INTERIOR SURFACE BY ROTATING SAID PIPE, AND (D) MAINTAINING SAID PIPE IN A STATE OF COOLING DURING THE APPLICATION OF SAID COATING MATERIAL AND THE CURING OF SAID COATING MATERIAL TO A POINT OF RESISTING FLOW OR SLUMPING WITH THE TEMPERATURE ADJACENT THE EXTERIOR SURFACE OF THE PIPE BEING LOWER THAN THE TEMPERATURE ADJACENT SAID INTERIOR SURFACE OF THE PIPE SO THAT THE TENDENCY FOR ANY FLOW OF GASES IN THE WALL OF SAID PIPE IS IN THE DIRECTION FROM SAID INTERIOR SURFACE TOWARD SAID EXTERIOR SURFACE OF SAID PIPE DURING THE APPLICATION OF SAID COATING MATERIAL AND THE CURING OF SAID COATING MATERIAL TO A POINT OF RESISTING FLOW OR SLUMPING.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |