US3810441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining machine
Assignee: Raymond International Inc
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Filing: 1971-06-07
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Granted: 1974-05-14
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Expires: 1991-06-07
Abstract
Abstract A MACHINE FOR APPLYING A FLUENT LINING MATERIAL TO THE INSIDE OF A PIPE WHICH IS ARRANGED TO BE PROGRESSED THROUGH THE PIPE AND WHICH INCLUDES DISTRIBUTOR MEANS FOR SLINGING MATERIAL IN A GENERALLY RADIAL SPRAY ON THE WALLS OF THE PIPE, AND SPACED TROWELLING MEANS FOR SMOOTHING THE LINING MATERIAL ON THE WALL AND A DIAPHGRAM INTERPOSED BETWEEN THE DISTRIBUTOR MEANS AND THE TROWELLING MEANS FOR INTERCEPTING REBOUND PARTICLES AND PREVENTING THEM FROM IMBEDDING IN THE FRESHTLY TROWELLED SURFACE.
Inventors
- 👤 C Padgett
- 👤 L Slade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:25
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D11/105; B; B05; B05B; B05B13/00; B05B13/06; B05B13/0627; B05B13/0636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |