US2867848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-stress cracking resistance of thermoplastic filamentous articles
Assignee: Phillips Petroleum Co
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Filing: 1956-11-23
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Granted: 1959-01-13
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Roger M Mcglamery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:50
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; B; B29; B29C; B29C48/00; B29C48/001; B29C48/15; B29C67/00; D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/28; D01F6/30; B29C48/03; B29C48/04; B29C48/05; B29C48/154; Y; Y10; Y10S; Y10S264/00; Y10S264/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF IMPARTING HEAT-STRESS CRACKING RESISTANCE TO A FILAMENTOUS ARTICLE OF CRYSTALLINE ETHYLENE POLYMER WHICH IS A POLYMERIZATE OF A MONOMER SYSTEM COMPRISING FROM 70 TO 100 WEIGHT PERCENT ETHYLENE, FROM 0 TO 30 WEIGHT PERCENT MONOOLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, 1-BUTENE, 2-BUTENE AND MIXTURES THEREOF, AND FROM 0 TO 3 WEIGHT PERCENT ACYCLIC MONOOLEFIN HAVING FROM 5 TO 12 CARBON ATOMS PER MOLECULE, SAID POLYMER BEING CHARACTERIZED BY A CRYSTALLINITY AT 25* C. OF AT LEAST 80 PERCENT, A DENSITY OF AT LEAST 0.94 GRAMS PER CUBIC CENTIMETER, AND A SOFTENING TEMPERATURE OF AT LEAST 240* F. WHICH COMPRISES APPLYING SUFFICIENT CIRCUMFERENTIAL PRESSURE TO THE SURFACE OF SAID ARTICLE AT A TEMPERATURE BELOW THE SOFTENING POINT OF SAID POLYMER TO EFFECT A REDUCTION IN DENSITY OF SAID POLYMER.
Claim 2
Independent Claim
133 words
A METHOD OF IMPARTING HEAT-STRESS CRACKING RESISTANCE TO A FILAMENTOUS ARTICLE OF CRYSTALLINE ETHYLENE POLYMER WHICH IS A POLYMERIZATE OF A MONOMER SYSTEM COMPRISING FROM 70 TO 100 WEIGHT PERCENT ETHYLENE, FROM 0 TO 30 WEIGHT PERCENT MONOOLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, 1-BUTENE, 2-BUTENE AND MIXTURES THEREOF, AND FROM 0 TO 3 WEIGHT PERCENT ACYCLIC MONOOLEFIN HAVING FROM 5 TO 12 CARBON ATOMS PER MOLECULE, SAID POLYMER BEING CHARACTERIZED BY A CRYSTALLINITY AT 25* C. OF AT LEAST 80 PERCENT, A DENSITY OF AT LEAST 0.94 GRAMS PER CUBIC CENTIMETER, AND A SOFTENING TEMPERATURE OF AT LEAST 240* F. WHICH COMPRISES APPLYING SUFFICIENT CIRCUMFERENTIAL PRESSURE TO THE SURFACE OF SAID ARTICLE AT A TEMPERATURE BELOW THE SOFTENING POINT OF SAID POLYMER TO EFFECT A REDUCTION IN DENSITY OF SAID POLYMER.
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |