Patent US2252091A successfully refreshed from Google Patents.
US2252091A
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Moistureproof sheet
Assignee: EIDP Inc
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Filing: 1938-08-13
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Granted: 1941-08-12
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Expires: 1958-08-13
Abstract
No abstract record available.
Inventors
- 👤 Muller Philipp
- 👤 Herrmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:16
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/048; C08J2301/00; C08J2301/06; C08J2429/00; C08J2429/02; C08J2429/04; C08J2431/00; C08J2431/02; C08J2431/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31855; Y10T428/3188; Y10T428/31884
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) | 1944-08-11 | 1945-02-10 | 1945-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-11 | 1949-02-10 | 1949-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-11 | 1953-02-10 | 1953-08-12 | $7700.00 | Window Closed / Lapsed |