US2365952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making plastic helicoidal structures
Assignee: Dow Chemical Co
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Filing: 1942-03-12
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Granted: 1944-12-26
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Expires: 1962-03-12
Abstract
No abstract record available.
Inventors
- 👤 Alden W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/12; B31; B31C; B31C3/00; B29L; B29L2031/00; B29L2031/34; B29L2031/3431; B29L2031/3462; Y; Y10; Y10S; Y10S264/00; Y10S264/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-12-26 | 1948-06-26 | 1948-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-26 | 1952-06-26 | 1952-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-26 | 1956-06-26 | 1956-12-26 | $7700.00 | Window Closed / Lapsed |