Patent US3079642A successfully refreshed from Google Patents.
US3079642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding olefin polymer
Assignee: Phillips Petroleum Co
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Filing: 1960-08-25
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Granted: 1963-03-05
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Expires: 1980-08-25
Abstract
No abstract record available.
Inventors
- 👤 Donald G Needham
- 👤 Tommy J Windle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/54; Y; Y10; Y10S; Y10S264/00; Y10S264/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF MOLDING A BLOCK OF OLEFIN POLYMER WITHOUT THE FORMATION OF VOIDS THEREIN WHICH COMPRISES PLACING MOLTEN OLEFIN POLYMER IN A BLOCK MOLD, APPLYING PRESSURE TO SAID POLYMER WHILE COOLING UNTIL A HARDENED SKIN OF POLYMER FORMS AROUND THE REMAINING STILL MOLTEN POLYMER, REMOVING THE POLYMER BLOCK THUS PARTIALLY COOLED
Claim 2
Independent Claim
52 words
A METHOD OF MOLDING A BLOCK OF OLEFIN POLYMER WITHOUT THE FORMATION OF VOIDS THEREIN WHICH COMPRISES PLACING MOLTEN OLEFIN POLYMER IN A BLOCK MOLD, APPLYING PRESSURE TO SAID POLYMER WHILE COOLING UNTIL A HARDENED SKIN OF POLYMER FORMS AROUND THE REMAINING STILL MOLTEN POLYMER, REMOVING THE POLYMER BLOCK THUS PARTIALLY COOLED
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |