US3008942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization system for vinyl aromatic monomers
Assignee: Wyeth Holdings LLC
•
Filing: 1958-01-16
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Granted: 1961-11-14
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Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 Henry Z Friedlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A METHOD OF MAKING A SOLID HOMOPOLYMER OF VINYL AROMATIC MONOMERIC COMPOUNDS HAVING THE FORMULA
Claim 2
Independent Claim
15 words
A METHOD OF MAKING A SOLID HOMOPOLYMER OF VINYL AROMATIC MONOMERIC COMPOUNDS HAVING THE 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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |