US2445768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of selenium products
Assignee: STC PLC
•
Filing: 1945-05-30
•
Granted: 1948-07-27
•
Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Driver Douglas Louis Ashton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; C; C23; C23C; C23C4/00; C23C4/18; C23C4/185; H10D48/0431; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/263; H10P14/29; H10P14/2901; H10P14/2923; H10P14/34; H10P14/3402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2342278A
Cited
US1807178A
Cited
US2189840A
Cited
US2219346A
Cited
US2317173A
Cited
US2345834A
Cited
US2354109A
Cited
US2334554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |