Patent US3024130A successfully refreshed from Google Patents.
US3024130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bonding a bituminous enamel protective coating to a suitable base such asmetallic pipes and pipe couplings
Assignee: Dresser Industries Inc
•
Filing: 1959-03-04
•
Granted: 1962-03-06
•
Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 George D Kish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:38
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; C; C09; C09D; C09D195/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD OF PROVIDING ON A PIPE A COATING RESISTANT TO DISBONDING FROM THE SURFACE OF SAID PIPE UPON IMPACT WHICH COMPRISES THE STEPS OF APPLYING TO SAID PIPE SURFACE A COATING OF A COMPOSITION CONTAINING COALTAR PITCH AND AN EPOXY RESIN IN THE PRESENCE OF A CURING AGENT FOR SAID EPOXY RESIN, HEATING SAID COATING TO EFFECT A PARTIAL CURING OF SAID COMPOSITION BY EXPOSING IT TO A HEATED GASEOUS MEDIUM AT A TEMPERATURE OF 200 TO 500* F. AND, BEFORE SAID LAST-NAMED COATING HAS CURED SUBSTANTIALLY, APPLYING TO SAID LAST-NAMED COATING A COATING OF A BITUMINOUS ENAMEL AT A TEMPERATURE OF 450* TO 525* F., AND ALLOWING SAID ENAMEL COATING TO DRY, WHEREBY AN INTERSTITIAL MIGRATION OF SAID COAL TAR PITCH AND EPOXY RESIN COMPOSITION AND SAID BITUMINOUS ENAMEL OCCURS AT THE INTERFACE THEREOF, RESULTING IN AN INTERSTITIAL KEYING BETWEEN THE TWO COATINGS.
Claim 2
Independent Claim
145 words
A METHOD OF PROVIDING ON A PIPE A COATING RESISTANT TO DISBONDING FROM THE SURFACE OF SAID PIPE UPON IMPACT WHICH COMPRISES THE STEPS OF APPLYING TO SAID PIPE SURFACE A COATING OF A COMPOSITION CONTAINING COALTAR PITCH AND AN EPOXY RESIN IN THE PRESENCE OF A CURING AGENT FOR SAID EPOXY RESIN, HEATING SAID COATING TO EFFECT A PARTIAL CURING OF SAID COMPOSITION BY EXPOSING IT TO A HEATED GASEOUS MEDIUM AT A TEMPERATURE OF 200 TO 500* F. AND, BEFORE SAID LAST-NAMED COATING HAS CURED SUBSTANTIALLY, APPLYING TO SAID LAST-NAMED COATING A COATING OF A BITUMINOUS ENAMEL AT A TEMPERATURE OF 450* TO 525* F., AND ALLOWING SAID ENAMEL COATING TO DRY, WHEREBY AN INTERSTITIAL MIGRATION OF SAID COAL TAR PITCH AND EPOXY RESIN COMPOSITION AND SAID BITUMINOUS ENAMEL OCCURS AT THE INTERFACE THEREOF, RESULTING IN AN INTERSTITIAL KEYING BETWEEN THE TWO COATINGS.
References Cited (Backward Citations)
US1381736A
Cited
US2170314A
Cited
US2707157A
Cited
US2749250A
Cited
US2765288A
Cited
US2864722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |