US2438480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of vinyl halide and vinylidene halide polymers
Assignee: Dow Chemical Co
•
Filing: 1944-04-05
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Granted: 1948-03-23
•
Expires: 1964-04-05
Abstract
No abstract record available.
Inventors
- 👤 George W Stanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:10
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02; C08L; C08L27/00; C08L27/02; Y; Y10; Y10S; Y10S260/00; Y10S260/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1983949A
Cited
US2013941A
Cited
GB525048A
Cited
US2277504A
Cited
US2380009A
Cited
US2343997A
Cited
US2337424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |