US3372920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing thermoplastic sheet material
Assignee: Millennium Petrochemicals Inc
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Filing: 1965-07-12
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Granted: 1968-03-12
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert O Corbett
- 👤 John J Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:04
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/001; B29C48/0013; B29C48/0015; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/11; B29C48/13; B29C48/16; B29C48/18; B29C48/21; B29L; B29L2031/00; B29L2031/60
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |