US2230654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrafluoroethylene polymers
Assignee: KINETIC CHEMICALS Inc
•
Filing: 1939-07-01
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Granted: 1941-02-04
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Expires: 1959-07-01
Abstract
No abstract record available.
Inventors
- 👤 Roy J Plunkett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:36
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08F; C08F14/00; C08F14/18; C08F14/26; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; D; D01; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/12; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10S; Y10S138/00; Y10S138/03; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/3024
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) | 1944-02-04 | 1944-08-05 | 1945-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-04 | 1948-08-05 | 1949-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-04 | 1952-08-05 | 1953-02-04 | $7700.00 | Window Closed / Lapsed |