US2891284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for molding objects of non-uniform thickness
Assignee: Union Carbide Corp
•
Filing: 1954-06-18
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Granted: 1959-06-23
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Expires: 1974-06-18
Abstract
No abstract record available.
Inventors
- 👤 Levin Nathan
- 👤 William J Smythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:22
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/12; B29C33/00; B29C33/0033; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S521/00; Y10S521/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2441548A
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US2521808A
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US2560783A
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US2642624A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |