US2957203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for making plastics
Assignee: Bayer Corp
•
Filing: 1957-04-26
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Granted: 1960-10-25
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Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
- 👤 Iii William W Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:04
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/405; B29B7/58; B29B7/582; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/904; Y10S264/00; Y10S264/13; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 0
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |