US3837899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating the interior surface of a metal vessel and the coated vessel
Assignee: ConocoPhillips Co
•
Filing: 1972-06-14
•
Granted: 1974-09-24
•
Expires: 1992-06-14
Abstract
Abstract Method of coating the interior surface of metal vessels with a first coating of a mastic-like material and second coating of a hydraulic cement.
Inventors
- 👤 B Carlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:21
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; B05D7/222; B05D7/227; B05D2202/00; B05D7/50; B05D7/51; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/31504; Y10T428/31678; Y10T428/31717
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A method of coating a metal vessel consisting essentially of: a. applying to the interior surface of said metal vessel a layer of asphalt, and b. applying on top of the layer of asphalt a layer of portland cement slurry.
Claim 2
Independent Claim
44 words
A method of lining the interior surface of a metal conduit consisting essentially of: a. applying to said surface a layer of asphalt, and b. applying on top of the layer of asphalt a layer of portland cement slurry by the centrifugal casting technique.
References Cited (Backward Citations)
US549342A
Cited
US1555257A
Cited
US1889644A
Cited
US2248098A
Cited
US2727832A
Cited
US3357851A
Cited
US3689305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |