US2238694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric materials
Assignee: EIDP Inc
•
Filing: 1939-05-15
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Granted: 1941-04-15
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Expires: 1959-05-15
Abstract
No abstract record available.
Inventors
- 👤 Graves George De Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:55
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/24; B29C41/26; B02; B02B; B02B1/00; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29C48/915; B29C48/917; B29D; B29D7/00; B29D7/01; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; B62M9/12; B62M9/131; D; D01; D01D; D01D5/00; D01D5/08; D01F; D01F6/00; D01F6/58; D01F6/60; D01F8/00; D01F8/04; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D06; D06M; D06M11/00; D06M11/01; D06M11/05; D06M15/00; D06M15/70; B29C48/05; B29K; B29K2077/00; B29K2995/00; B29K2995/0018; B29K2995/0026; Y; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S428/00; Y10S428/91; Y10S8/00; Y10S8/21; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/2978; Y10T428/298; Y10T428/31504; Y10T428/31725; Y10T428/31739
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) | 1944-04-14 | 1944-10-14 | 1945-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-14 | 1948-10-14 | 1949-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-14 | 1952-10-14 | 1953-04-15 | $7700.00 | Window Closed / Lapsed |