US2986547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coloring vinyl aromatic polymers
Assignee: Wyeth Holdings LLC
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Filing: 1958-07-10
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Granted: 1961-05-30
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Expires: 1978-07-10
Abstract
No abstract record available.
Inventors
- 👤 Albert W Jefts
- 👤 Herbert G Rotherham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:02
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J2325/00; C08J2325/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A CONTINUOUS PROCESS FOR DISPERSING A COLORANT INTO A POLYMERIC MATERIAL, PREPARED BY POLYMERIZING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL AROMATIC MONOMERS HAVING THE FORMULA:
Claim 2
Dependent Claim
28 words
A CONTINUOUS PROCESS FOR DISPERSING A COLORANT INTO A POLYMERIC MATERIAL, PREPARED BY POLYMERIZING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL AROMATIC MONOMERS 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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |