Patent US3544671A successfully refreshed from Google Patents.
US3544671A
Expired / Lapsed
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Process for neck drawing block copolymer films and filaments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1969-07-01
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Granted: 1970-12-01
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Expires: 1989-07-01
Abstract
No abstract record available.
Inventors
- 👤 Denis James Henry Sandiford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:28
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; D01F; D01F6/00; D01F6/28; D01F6/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352725A
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US3175999A
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US2948583A
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US3022541A
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US3214503A
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US3184369A
Cited
US3426754A
Cited
US3407253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |