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US2456262A
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Fabrication of polytetrafluoroethylene articles
Assignee: EIDP Inc
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Filing: 1946-03-29
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Granted: 1948-12-14
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Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 Reuben T Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:09
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/003; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946; Y10S285/00; Y10S285/91; Y10S417/00; Y10S417/01
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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |