Patent US3001698A successfully refreshed from Google Patents.
US3294607A
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Method of making flexible reinforced conduit
Assignee: Day International Corp
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Filing: 1963-07-15
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Granted: 1966-12-27
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Edward M Rothermel
- 👤 Jr Russell B Waddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:26
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29C; B29C63/00; B29C63/38; B29C63/42; F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/112; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29L; B29L2023/00; B29L2023/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR THE MANUFACTURE OF FLEXIBLE REINFORCED CONDUIT COMPRISING THE STEPS OF FROMIMG A TUBE OF ELASTOMERIC MATERIAL HAVING A PREDETERMINED DIAMETER, POSITIONING THEREOVER A CIRCUMFERENTIAL REINFORCING MEMBER HAVING AXIALLY SPACED COILS WITH AN INNER DIAMETER GREATER THAN THE DIAMETER OF SAID TUBE, RADIALLY EXPANDING SAID TUBE WITHIN ITS ELASTIC LIMITS TO CAUSE PORTIONS OF ITS OUTER SURFACE TO ENGAGE THE INNER SURFACES OF SAID COILS, BONDING THE SO ENGAGED SURFACES TO EACH OTHER AND RELEASING SAID TUBE FROM ITS EXPANDED POSITION TO CAUSE SAID TUBE TO DEPEND INWARDLY BETWEEN SAID COILS.
Claim 2
Independent Claim
93 words
A METHOD FOR THE MANUFACTURE OF FLEXIBLE REINFORCED CONDUIT COMPRISING THE STEPS OF FROMIMG A TUBE OF ELASTOMERIC MATERIAL HAVING A PREDETERMINED DIAMETER, POSITIONING THEREOVER A CIRCUMFERENTIAL REINFORCING MEMBER HAVING AXIALLY SPACED COILS WITH AN INNER DIAMETER GREATER THAN THE DIAMETER OF SAID TUBE, RADIALLY EXPANDING SAID TUBE WITHIN ITS ELASTIC LIMITS TO CAUSE PORTIONS OF ITS OUTER SURFACE TO ENGAGE THE INNER SURFACES OF SAID COILS, BONDING THE SO ENGAGED SURFACES TO EACH OTHER AND RELEASING SAID TUBE FROM ITS EXPANDED POSITION TO CAUSE SAID TUBE TO DEPEND INWARDLY BETWEEN SAID COILS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |