US3112300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isotactic polypropylene
Assignee: Montedison SpA
•
Filing: 1957-12-09
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Granted: 1963-11-26
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Pino Piero
- 👤 Mazzanti Giorgio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
B; B29; B29C; B29C59/00; C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; C08F10/08; C08F10/14; C08F110/00; C08F110/04; C08F110/06; C08F112/00; C08F112/02; C08F112/04; C08F112/06; C08F112/08; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F6/00; C08F6/04; C08L; C08L53/00; C08F110/08; C08F110/14; C08F210/00; C08F210/16; Y; Y10; Y10S; Y10S526/00; Y10S526/907; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A HIGH MOLECULAR WEIGHT POLYPROPYLENE CONSISTING ESSENTIALLY OF ISOTACTIC POLYPROPYLENE MADE UP OF ISOTACTIC MACROMOLECULES WHICH ARE INSOLUBLE IN BOILING N-HEPTANE AND HAVE SUBSTANTIALLY THE TYPE OF STEREOREGULAR STRUCTURE ILLUSTRATED IN THE MODEL OF A PORTION OF AN ISOTACTIC POLYPROPYLENE MACROMOLECULE, FULLY EXTENDED IN A PLANE, AS SHOWN IN FIGURE 2 OF THE ACCOMPANYING DRAWING.
Claim 2
Dependent Claim
55 words
A HIGH MOLECULAR WEIGHT POLYPROPYLENE CONSISTING ESSENTIALLY OF ISOTACTIC POLYPROPYLENE MADE UP OF ISOTACTIC MACROMOLECULES WHICH ARE INSOLUBLE IN BOILING N-HEPTANE AND HAVE SUBSTANTIALLY THE TYPE OF STEREOREGULAR STRUCTURE ILLUSTRATED IN THE MODEL OF A PORTION OF AN ISOTACTIC POLYPROPYLENE MACROMOLECULE, FULLY EXTENDED IN A PLANE, AS SHOWN IN FIGURE 2 OF THE ACCOMPANYING DRAWING.
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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |