US3151104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of propadiene
Assignee: EIDP Inc
•
Filing: 1958-05-22
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Granted: 1964-09-29
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Expires: 1978-05-22
Abstract
No abstract record available.
Inventors
- 👤 Robinson Ivan Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:52
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/20; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F236/00; C08F236/02; C08F236/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE PROCESS OF PREPARING A LINEAR POLYPROPADIENE COMPRISING SUBJECTING PROPADIENE TO A TEMPERATURE OF 0* TO 300*C. AND A PRESSURE OF 1 TO 200 ATMOSPHERES IN THE PRESENCE OF A POLYVALENT METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALIDES AND ESTERS OF TITANIUM, ZIRCONIUM, CERIUM, VANADIUM, NIOBIUM, TANTALUM, CHROMIUM, MOLYBDENUM, AND TUNGSTEN AND A SUFFICIENT AMOUNT OF AN ORGANOMETALLIC COMPOUND HAVING AT LEAST ONE METALHYDROCARBON BOND TO REDUCE THE VALENCE OF SAID POLYVALENT METAL TO TWO, AND RECOVERING A LINEAR POLYPROPADIENE.
Claim 2
Dependent Claim
82 words
THE PROCESS OF PREPARING A LINEAR POLYPROPADIENE COMPRISING SUBJECTING PROPADIENE TO A TEMPERATURE OF 0* TO 300*C. AND A PRESSURE OF 1 TO 200 ATMOSPHERES IN THE PRESENCE OF A POLYVALENT METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALIDES AND ESTERS OF TITANIUM, ZIRCONIUM, CERIUM, VANADIUM, NIOBIUM, TANTALUM, CHROMIUM, MOLYBDENUM, AND TUNGSTEN AND A SUFFICIENT AMOUNT OF AN ORGANOMETALLIC COMPOUND HAVING AT LEAST ONE METALHYDROCARBON BOND TO REDUCE THE VALENCE OF SAID POLYVALENT METAL TO TWO, AND RECOVERING A LINEAR POLYPROPADIENE.
References Cited (Backward Citations)
US2905645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |