US2252999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article and process for the manufacture thereof
Assignee: Sylvania Industrial Corp
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Filing: 1938-04-13
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Granted: 1941-08-19
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Expires: 1958-04-13
Abstract
No abstract record available.
Inventors
- 👤 Roger Wallach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:32
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/48; D02G3/22; D02G3/40; D02G3/402; Y; Y10; Y10S; Y10S264/00; Y10S264/75; Y10S8/00; Y10S8/10; Y10S8/21; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
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) | 1944-08-18 | 1945-02-17 | 1945-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-18 | 1949-02-17 | 1949-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-18 | 1953-02-17 | 1953-08-19 | $7700.00 | Window Closed / Lapsed |