US2789934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for lining a system of pipes
Assignee: Accumulatoren Fabrik AG
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Filing: 1955-05-10
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Granted: 1957-04-23
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Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Busbach Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29D23/003; B29D23/008; B29C; B29C49/00; B29C49/24; B29C49/26; B29C51/00; B29C51/10; Y; Y10; Y10S; Y10S285/00; Y10S285/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR LINING A SYSTEM OF PIPES INCLUDING A MAIN PIPE AND BRANCH PIPES WITH TUBES OF CORROSIONPROOF MOLDABLE MATERIAL WHICH COMPRISES INTRODUCTING A TUBE OF SAID MATERIAL INTO SAID MAIN PIPE, INTRODUCING TUBES OF SAID MATERIAL INTO SAID BRANCH PIPES, CLOSING ONE END OF SAID MAIN PIPE IN THE AIR-TIGHT MANNER, THEREAFTER PASSING COMPRESSED AIR FROM THE OTHER END IN THE MAIN PIPE SO AS TO FORCE THE TUBE THEREIN INTO THE BRANCH PIPES AND CONTINUING SAID ACTION UNTIL A BUBBLE FORMED IN THE TUBE LINING OF THE MAIN PIPE BURSTS AND CAUSES THE RESULTING ENDS TO UNITE WITH THE TUBE LINING OF THE BRANCH PIPES.
Claim 2
Dependent Claim
108 words
A PROCESS FOR LINING A SYSTEM OF PIPES INCLUDING A MAIN PIPE AND BRANCH PIPES WITH TUBES OF CORROSIONPROOF MOLDABLE MATERIAL WHICH COMPRISES INTRODUCTING A TUBE OF SAID MATERIAL INTO SAID MAIN PIPE, INTRODUCING TUBES OF SAID MATERIAL INTO SAID BRANCH PIPES, CLOSING ONE END OF SAID MAIN PIPE IN THE AIR-TIGHT MANNER, THEREAFTER PASSING COMPRESSED AIR FROM THE OTHER END IN THE MAIN PIPE SO AS TO FORCE THE TUBE THEREIN INTO THE BRANCH PIPES AND CONTINUING SAID ACTION UNTIL A BUBBLE FORMED IN THE TUBE LINING OF THE MAIN PIPE BURSTS AND CAUSES THE RESULTING ENDS TO UNITE WITH THE TUBE LINING OF THE BRANCH PIPES.
References Cited (Backward Citations)
US2349177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |