Patent US2515136A successfully refreshed from Google Patents.
US2515136A
Expired / Lapsed
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Method of melting polymers
Assignee: Wingfoot Corp
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Filing: 1947-07-18
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Granted: 1950-07-11
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Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
- 👤 William T Pigott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:37
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/04; B; B29; B29B; B29B13/00; B29B13/02; B29B13/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD FOR MELTING A SOLID POLYMER OF THE GROUP CONSISTING OF LINEAR POLYAMIDES, LINEAR POLYESTERS AND LINEAR POLYESTER-AMIDES WHICH COMPRISES SUSPENDING A ROD OF SAID POLYMER IN A HEATED TUBULAR FURNACE, HEATING THE ROD SOLELY BY RADIATION FROM SAID TUBULAR FURNACE AND ALLOW-
Claim 2
Independent Claim
44 words
A METHOD FOR MELTING A SOLID POLYMER OF THE GROUP CONSISTING OF LINEAR POLYAMIDES, LINEAR POLYESTERS AND LINEAR POLYESTER-AMIDES WHICH COMPRISES SUSPENDING A ROD OF SAID POLYMER IN A HEATED TUBULAR FURNACE, HEATING THE ROD SOLELY BY RADIATION FROM SAID TUBULAR FURNACE AND ALLOW-
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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |