US3761458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process and products
Assignee: Shell USA Inc
•
Filing: 1969-10-03
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Granted: 1973-09-25
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Expires: 1989-10-03
Abstract
Abstract METHOD ARE DISCLOSED FOR HOMOPOLYMERIZATION OF A LARGE VARIETY OF POLAR-SUBSTITUTED ALPHA-MONOOLEFINS AND FOR THE RANDOM COPOLYMERIZATION AND BLOCK COPOLYMERIZATION OF POLAR-SUBSTITUTED ALPHA MONOOLEFIN WITH ALPHA MONOOLEFIN HYDROCARBONS.
Inventors
- 👤 H Holler
- 👤 E Youngman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:24
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/02; C08F297/00; C08F297/06
Claims Analysis
Total Claims: 0
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |