US2750631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing ribbed extruded sheet material
Assignee: Clopay Corp
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Filing: 1952-07-22
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Granted: 1956-06-19
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Expires: 1972-07-22
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/03; B29C48/09; B29C48/10; B29C48/001; B29C48/0018; B29C48/0019; B29L; B29L2023/00; B29L2023/003; Y; Y10; Y10S; Y10S264/00; Y10S264/81; Y10S29/00; Y10S29/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF PRODUCING A THIN, RIBBED SHEET OF MATERIAL WHICH INCLUDES EXTRUDING A MOLTEN THERMOPLASTIC COMPOSITION IN A VERTICAL UPWARD DIRECTION IN THE FORM OF A SEAMLESS TUBE, FORMING A PLURALITY OF RIBS ON ONE SURFACE OF SAID TUBE, DRAWING SAID TUBING UPWARDLY, INFLATING SAID TUBE AS IT MOVES UPWARDLY, AND COOLING SAID TUBING AS IT MOVES UPWARDLY, WHEREBY THE RIBS FORMED ON ONE SURFACE APPEAR ON BOTH SURFACES.
Claim 2
Independent Claim
70 words
THE METHOD OF PRODUCING A THIN, RIBBED SHEET OF MATERIAL WHICH INCLUDES EXTRUDING A MOLTEN THERMOPLASTIC COMPOSITION IN A VERTICAL UPWARD DIRECTION IN THE FORM OF A SEAMLESS TUBE, FORMING A PLURALITY OF RIBS ON ONE SURFACE OF SAID TUBE, DRAWING SAID TUBING UPWARDLY, INFLATING SAID TUBE AS IT MOVES UPWARDLY, AND COOLING SAID TUBING AS IT MOVES UPWARDLY, WHEREBY THE RIBS FORMED ON ONE SURFACE APPEAR ON BOTH SURFACES.
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) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |