Patent US3300459A successfully refreshed from Google Patents.
US3300459A
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US
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Elastomeric copolymers of ethylene and propylene
Assignee: Montedison SpA
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Filing: 1966-08-11
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Granted: 1967-01-24
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Expires: 1986-08-11
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Mazzanti Giorgio
- 👤 Boschi Giorgio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084; C08; C08F; C08F10/00; C08F210/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AMORPHOUS, ELASTOMERIC, LINEAR COPOLYMERS OF ETHYLENE AND PROPYLENE CONTAINING FROM 20% TO ABOUT 70% BY WEIGHT OF ETHYLENE IN THE MACROMOLECULE, CHARACTERIZED IN THAT THE INFRA-RED SPECTRA THEREOF SHOW, IN THE 13 TO 14 MICRON REGION, ABSORPTIONS AT 13.6 MICRONS AND AT 13.85 MICRONS, AND SHOW, IN THE 10 TO 11 MICRON REGION, ABSORPTIONS AT 10.67 MICRONS AND AT 10.3 MICRONS, AND FURTHER CHARACTERIZED IN BEING SUBSTANTIALLY FREE OF HOMOPOLYMERS, AND IN HAVING A MOLECULAR WEIGHT ABOVE 20,000, AS DETERMINED BY VISCOSITY MEASURMENTS IN TETRALIN AT 135*C. AND CALCULATED BY THE FORMULA (N)=1.18 X 10(**-3)X M(**0.65) IN WHICH (N) REPRESENTS INTRINSIC VISCOSITY AND M REPRESENTS MOLECULAR WEIGHT.
Claim 2
Dependent Claim
107 words
AMORPHOUS, ELASTOMERIC, LINEAR COPOLYMERS OF ETHYLENE AND PROPYLENE CONTAINING FROM 20% TO ABOUT 70% BY WEIGHT OF ETHYLENE IN THE MACROMOLECULE, CHARACTERIZED IN THAT THE INFRA-RED SPECTRA THEREOF SHOW, IN THE 13 TO 14 MICRON REGION, ABSORPTIONS AT 13.6 MICRONS AND AT 13.85 MICRONS, AND SHOW, IN THE 10 TO 11 MICRON REGION, ABSORPTIONS AT 10.67 MICRONS AND AT 10.3 MICRONS, AND FURTHER CHARACTERIZED IN BEING SUBSTANTIALLY FREE OF HOMOPOLYMERS, AND IN HAVING A MOLECULAR WEIGHT ABOVE 20,000, AS DETERMINED BY VISCOSITY MEASURMENTS IN TETRALIN AT 135*C. AND CALCULATED BY THE FORMULA (N)=1.18 X 10(**-3)X M(**0.65) IN WHICH (N) REPRESENTS INTRINSIC VISCOSITY AND M REPRESENTS MOLECULAR WEIGHT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |