US3439049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organolithium polymerization initiator
Assignee: Phillips Petroleum Co
•
Filing: 1964-05-11
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Granted: 1969-04-15
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 William J Trepka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:20
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/02; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A POLYMERIZATION INITIATOR WHICH IS FREE OF ASSOCIATED THER AND HAS THE FORMULA
Claim 2
Dependent Claim
13 words
A POLYMERIZATION INITIATOR WHICH IS FREE OF ASSOCIATED THER AND HAS THE FORMULA
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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |