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US2201931A
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Article of manufacture
Assignee: EIDP Inc
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Filing: 1937-12-31
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Granted: 1940-05-21
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Expires: 1957-12-31
Abstract
No abstract record available.
Inventors
- 👤 David J Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:34
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/693; Y; Y10; Y10S; Y10S36/00; Y10S36/02; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/24; Y10T428/24479; Y10T428/24612
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) | 1943-05-21 | 1943-11-20 | 1944-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-21 | 1947-11-20 | 1948-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-21 | 1951-11-20 | 1952-05-21 | $7700.00 | Window Closed / Lapsed |