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Patent EP0020154A1 successfully refreshed from Google Patents.
US3513152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable olefin polymer
Assignee: Phillips Petroleum Co
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Filing: 1966-04-29
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Granted: 1970-05-19
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Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 John Paul Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:46
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
POLYETHYLENE HAVING A DENSITY OF AT LEAST 0.94 GRAM PER CUBIT CENTIMETER, A MELT INDEX OF 0.1 TO 50, A WEIGHT AVERAGE MOLECULAR WEIGHT OF ABOUT 40,000 TO 160,000, A RATIO OF WEIGHT AVERAGE TO NUMBER AVERAGE MOLECULARE WEIGHT OF 3 TO 6, AND ANINFRARED SPECTRUM SHOWING AN ABSENCE OF ABSORPTION BANDS AT 10.1 AND 11 MICRONS.
Claim 2
Dependent Claim
57 words
POLYETHYLENE HAVING A DENSITY OF AT LEAST 0.94 GRAM PER CUBIT CENTIMETER, A MELT INDEX OF 0.1 TO 50, A WEIGHT AVERAGE MOLECULAR WEIGHT OF ABOUT 40,000 TO 160,000, A RATIO OF WEIGHT AVERAGE TO NUMBER AVERAGE MOLECULARE WEIGHT OF 3 TO 6, AND ANINFRARED SPECTRUM SHOWING AN ABSENCE OF ABSORPTION BANDS AT 10.1 AND 11 MICRONS.
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) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |