Patent US2660686A successfully refreshed from Google Patents.
US2660686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen
Assignee: Westinghouse Electric Corp
•
Filing: 1948-06-19
•
Granted: 1953-11-24
•
Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles W Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:22
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066; C03C3/12; C03C3/253; H01J29/18; H01J29/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2088595A
Cited
US1961603A
Cited
US2094630A
Cited
US2072115A
Cited
US2137118A
Cited
US2152991A
Cited
US2123939A
Cited
US2179083A
Cited
US2178238A
Cited
US2278742A
Cited
US2237288A
Cited
US2198479A
Cited
US2315328A
Cited
US2212134A
Cited
US2298968A
Cited
US2400147A
Cited
US2423626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |