US2485691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of extruded polytetrafluoroethylene articles
Assignee: EIDP Inc
•
Filing: 1948-02-20
•
Granted: 1949-10-25
•
Expires: 1968-02-20
Abstract
No abstract record available.
Inventors
- 👤 Bogese Stephen Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/003; B29C48/00; B29C48/022; B29C48/03; B29C48/06; B29C48/04; B29C48/09; B29C48/10; B29C48/15; B29C48/151; B29C48/154; B29C48/155; B29C48/16; B29C48/18; B29C48/19; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2105/00; B29K2105/0088; B29K2105/25; B29K2105/251; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2400091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |