US3085293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tube forming method
Assignee: EIDP Inc
•
Filing: 1960-04-04
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Granted: 1963-04-16
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Mathew F Kritchever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:59
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/03; B29C48/09; B29C48/10; B29C48/001; B29C48/0018; B29C48/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A METHOD FOR FORMING A TUBULAR THERMOPLASTIC FILM THE STEPS OF EXTRUDING A HEATED THERMOPLASTIC RESIN THROUGH A TUBULAR DIE TO FORM A FILM, DRAWING THE FILM OVER A HOLLOW MANDREL IN AIR-SEALING RELATION THEREWITH AND THENCE OVER A TAKE-UP ROLL TO FORM AN UPPER ENCLOSED AIR
Claim 2
Dependent Claim
48 words
IN A METHOD FOR FORMING A TUBULAR THERMOPLASTIC FILM THE STEPS OF EXTRUDING A HEATED THERMOPLASTIC RESIN THROUGH A TUBULAR DIE TO FORM A FILM, DRAWING THE FILM OVER A HOLLOW MANDREL IN AIR-SEALING RELATION THEREWITH AND THENCE OVER A TAKE-UP ROLL TO FORM AN UPPER ENCLOSED AIR
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |