Patent US3674388A successfully refreshed from Google Patents.
US3674388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of plastic siding
Assignee: Certainteed LLC
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Filing: 1970-01-14
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Granted: 1972-07-04
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Expires: 1990-01-14
Abstract
Abstract PLASTICATED POLYVINYL RESIN MATERIAL IS EXTRUDED IN A SHAPE APPROXIMATELY THE CROSS SECTIONAL SHAPE OF THE SIDING AND EQUIPMENT IS PROVIDED FOR AIR SIZING AND AIR COOLING THE EXTRUDED SHAPE, SO AS TO ACCURATELY DIMENSION THE SIDING AS IT IS BEING HARDENED.
Inventors
- 👤 Peter F Heilmayr
- 👤 Sol B Kimbrell
- 👤 Joseph C Giuffre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/908; B29C48/03; B29C48/12; B29C48/911; B29C48/07; B29C48/08
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |