US3424823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of vinyl chloride polymers and copolymers of alkenyl aromatic hydrocarbons and acrylonitrile or methacrylonitrile
Assignee: Dow Chemical Co
•
Filing: 1967-07-31
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Granted: 1969-01-28
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Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Richard H Hall
- 👤 Junior J Lamson
- 👤 Andrew J Sikkema
- 👤 Carleton W Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:29
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/16; C08K; C08K5/00; C08K5/02; C08K5/03; C08L25/04; C08L25/08; C08L25/12; C08L25/18; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2646417A
Cited
US2988530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |