Patent US3679531A successfully refreshed from Google Patents.
US3679531A
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Shaped section of a thermoplastic synthetic material
Assignee: Dynamit Nobel AG
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Filing: 1969-04-07
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Granted: 1972-07-25
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Expires: 1989-04-07
Abstract
Abstract THE PRESENT DISCLOSURE IS DIRECTED TO A SHAPED SECTION OF A THEMOPLASTIC SYNTHETIC MATERIAL CONTAINING AT LEAST ONE TONGUE PORTION AND AT LEAST ONE GROOVE PORTION FOR MUTUAL JOINING OR FOR FURTHER JOINING SAID SECTION WITH SIMILARLY SHAPED SECTIONS CONTAINING IDENTICAL TONGUE AND GROOVE PORTIONS WHEREIN THE CROSS-SECTIONAL CONFIGURATIONS OF SAID TONGUE AND GROOVE PORTIONS ARE ADAPTED TO EACH OTHER SUCH THAT UPON INTERLOCKING WITH EACH OTHER, THEY ARE DEFORMED AND PRESSED TOGETHER IN A FLUSH UNION ALONG THEIR ENTIRE SURFACE.
Inventors
- 👤 Michael Wienand
- 👤 Klaus Jensen
- 👤 Franz Primessing
- 👤 Franz-Werner Alfter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:55
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/14; F16L11/16; B; B29; B29C; B29C65/00; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1242; B29C66/12423; B29C66/1244; B29C66/12443; B29C66/1246; B29C66/12461; B29C66/50; B29C66/51; B29C66/52; B29C66/524; B29C66/70; B29C66/72; B29C66/725; B29C66/7252; B29C66/72523; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; E; E04; E04C; E04C2/00; E04C2/30; E04C2/40; B29C66/71; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24744; Y10T428/24777; Y10T428/24802
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |