US3661621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing tubular structures coated on both sides
Assignee: Dow Produktions und Vertriebs GmbH and Co OHG
•
Filing: 1969-06-04
•
Granted: 1972-05-09
•
Expires: 1989-06-04
Abstract
Abstract Process for continuous production of inside and outside coated artificial tubular structures by first coating one side, thereafter applying vacuum from the other side to remove gases and impregnate the tube and then coating the second side and thereafter solidifing, washing and drying the tube, this process being carried out in a continuously working apparatus.
Inventors
- 👤 Eugen Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:20
CPC Classifications
B; B05; B05C; B05C9/00; B05C9/04; B05C9/045; B05D; B05D3/00; B05D3/04; B05D3/0493; B05D7/00; B05D7/22; B05D7/222; B05D2254/00; B05D2254/04; B05D2254/06; Y; Y10; Y10S; Y10S118/00; Y10S118/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
The process of claim 1 wherein said coating step (a) is applied to the inside of long-fiber fabric tubing, and said evacuating and impregnating step (b) and said coating step (c) is applied from the outside of long-fiber fabric tubing.
Claim 2
Dependent Claim
25 words
The process of claim 1 wherein said steps (a) to (c) are carried out by guiding the long-fiber of fabric tubing in a downward direction.
References Cited (Backward Citations)
US1195414A
Cited
CA750888A
Cited
US2125025A
Cited
US2201457A
Cited
US2460480A
Cited
US2584660A
Cited
US2910380A
Cited
US3378379A
Cited
US3376810A
Cited
FR1369173A
Cited
US3451827A
Cited
US3476078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |