Patent US3163183A successfully refreshed from Google Patents.
US3163183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer pipes
Assignee: Mitsubishi Engineering and Shipbuilding Co Ltd
•
Filing: 1961-05-16
•
Granted: 1964-12-29
•
Expires: 1981-05-16
Abstract
No abstract record available.
Inventors
- 👤 Sagara Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; B21C37/15; B21C37/154; F; F16; F16L; F16L9/00; F16L9/02; F16L9/04; F16L9/16; F16L9/165; F17; F17C; F17C1/00; F17C1/02; F17C1/04; F17C1/06; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/05; F17C2201/056; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0609; F17C2203/0612; F17C2203/0614; F17C2203/0624; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2209/00; F17C2209/22; F17C2209/221; F17C2209/23; F17C2209/232; F17C2223/00; F17C2223/03; F17C2223/035; F17C2250/00; F17C2250/03; F17C2250/036; F17C2260/00; F17C2260/01; F17C2260/013; F17C2260/04; F17C2260/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A MULTI-LAYER PIPE FOR FLUIDS UNDER PRESSURE COMPRISING A SINGLE STRIP SPIRALLY WOUND IN THE FORM OF A COIL, EACH LAYER OF SAID COIL BEING IN INTIMATE CONTACT WITH THE ADJACENT LAYER, MEANS FOR FIXING THE OUTSIDE DIAMETER AND THE INSIDE DIAMETER OF SAID COIL, AND A PLURALITY OF FLUID-ESCAPING OPENINGS EXTENDING THROUGH ALL THE LAYERS OF THE PIPE EXCEPT THE INNERMOST LAYER THEREOF.
Claim 2
Dependent Claim
64 words
A MULTI-LAYER PIPE FOR FLUIDS UNDER PRESSURE COMPRISING A SINGLE STRIP SPIRALLY WOUND IN THE FORM OF A COIL, EACH LAYER OF SAID COIL BEING IN INTIMATE CONTACT WITH THE ADJACENT LAYER, MEANS FOR FIXING THE OUTSIDE DIAMETER AND THE INSIDE DIAMETER OF SAID COIL, AND A PLURALITY OF FLUID-ESCAPING OPENINGS EXTENDING THROUGH ALL THE LAYERS OF THE PIPE EXCEPT THE INNERMOST LAYER THEREOF.
References Cited (Backward Citations)
US441884A
Cited
US1883662A
Cited
US1963745A
Cited
US2337247A
Cited
US2380107A
Cited
US2866480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-29 | 1968-06-29 | 1968-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-29 | 1972-06-29 | 1972-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-29 | 1976-06-29 | 1976-12-29 | $7700.00 | Window Closed / Lapsed |