US3293194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of disilacyclobutane in the presence of a platinum catalyst
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-02-01
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Granted: 1966-12-20
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lovie John Cormack
- 👤 Watt James Alastair Crichton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR THE PRODUCTION OF SILMETHYLENE POLYMERS COMPRISING POLYMERISING A SUBSTITUTED DISILACYCLOBUTANE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
17 words
A PROCESS FOR THE PRODUCTION OF SILMETHYLENE POLYMERS COMPRISING POLYMERISING A SUBSTITUTED DISILACYCLOBUTANE OF THE GENERAL FORMULA
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |