Patent US3069381A successfully refreshed from Google Patents.
US3069381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing segmented copolymers
Assignee: Shell USA Inc
•
Filing: 1953-12-07
•
Granted: 1962-12-18
•
Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Nozaki Kenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:19
CPC Classifications
C; C08; C08F; C08F293/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR PREPARING SEGMENTED COPOLYMERS WHICH CONSISTS ESSENTIALLY OF ADDING IN THE ABSENCE OF ANY FURTHER ADDITION OF POLYMERIZATION CATALYST, (A) A NONTHERMALLY POLYMERIZABLE MONOETHYLENICALLY UNSATURATED MONOMER WHICH MONOMER DOES NOT FORM PRODUCTS HAVING MORE THAN 2 UNITS OF MONOMER WHEN EXPOSED IN THE PURE STATE IN THE ABSENCE OF MOLECULAR OXYGEN AND ANY POLYMERIZATION CATALYST AND WHICH MONOMER IS SUBSTANTIALLY FREE OF OXYGEN TO A TEMPERATURE UP TO 100*C., TO (B) A FRESHLY PREPARED COMPOSITION WHICH HAS BEEN OBTAINED BY POLYMERIZING, IN THE SUBSTANTIAL ABSENCE OF MOLECULAR OXYGEN AND UNTIL THERE IS SUBSTANTIALLY NO UNPOLYMERIZED MONOMER REMAINING, A SPECIAL ETHYLENICALLY UNSATURATED MONOMER WHICH IS DISSIMILAR TO THE MONOMER USED IN (A) ABOVE AND IS A MEMBER OF THE GROUP CONSISTING OF (1) MONOMERS OF THE FORMULA
Claim 2
Dependent Claim
128 words
A PROCESS FOR PREPARING SEGMENTED COPOLYMERS WHICH CONSISTS ESSENTIALLY OF ADDING IN THE ABSENCE OF ANY FURTHER ADDITION OF POLYMERIZATION CATALYST, (A) A NONTHERMALLY POLYMERIZABLE MONOETHYLENICALLY UNSATURATED MONOMER WHICH MONOMER DOES NOT FORM PRODUCTS HAVING MORE THAN 2 UNITS OF MONOMER WHEN EXPOSED IN THE PURE STATE IN THE ABSENCE OF MOLECULAR OXYGEN AND ANY POLYMERIZATION CATALYST AND WHICH MONOMER IS SUBSTANTIALLY FREE OF OXYGEN TO A TEMPERATURE UP TO 100*C., TO (B) A FRESHLY PREPARED COMPOSITION WHICH HAS BEEN OBTAINED BY POLYMERIZING, IN THE SUBSTANTIAL ABSENCE OF MOLECULAR OXYGEN AND UNTIL THERE IS SUBSTANTIALLY NO UNPOLYMERIZED MONOMER REMAINING, A SPECIAL ETHYLENICALLY UNSATURATED MONOMER WHICH IS DISSIMILAR TO THE MONOMER USED IN (A) ABOVE AND IS A MEMBER OF THE GROUP CONSISTING OF (1) MONOMERS OF THE FORMULA
References Cited (Backward Citations)
US1938730A
Cited
US2388685A
Cited
US2356091A
Cited
US2460300A
Cited
US2614089A
Cited
US2610962A
Cited
US2666025A
Cited
US2666042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |