US2393668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent stencil sheet material
Assignee: 3M Co
•
Filing: 1941-01-06
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Granted: 1946-01-29
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Expires: 1961-01-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Wartha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:42
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/06; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/31504; Y10T428/31826; Y10T428/3183; Y10T428/31841; Y10T428/31855; Y10T428/31909; Y10T428/31924
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) | 1949-01-28 | 1949-07-30 | 1950-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-28 | 1953-07-30 | 1954-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-28 | 1957-07-30 | 1958-01-29 | $7700.00 | Window Closed / Lapsed |