Patent US3780497A successfully refreshed from Google Patents.
Patent US2238681A successfully refreshed from Google Patents.
US2238681A
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Assignee: EIDP Inc
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Filing: 1939-03-16
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Granted: 1941-04-15
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Expires: 1959-03-16
Abstract
No abstract record available.
Inventors
- 👤 George L Dorough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:24
CPC Classifications
B; B65; B65D; B65D53/00; B65D53/04; Y; Y10; Y10S; Y10S425/00; Y10S425/809; Y10T; Y10T428/00; Y10T428/21; Y10T428/214; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
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 |