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US3536644A
Expired / Lapsed
US
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Means for providing biaxially oriented polypropylene films with improved physical properties
Assignee: Millennium Petrochemicals Inc
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Filing: 1967-06-22
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Granted: 1970-10-27
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Expires: 1987-06-22
Abstract
No abstract record available.
Inventors
- 👤 William G Frizelle
- 👤 William F Beveridge
- 👤 Joseph R Kincaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08L; C08L23/00; C08L23/02; C08L23/10; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 0
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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) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |