US2194418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a cathode-ray tube envelope
Assignee: Hygrade Sylvania Corp
•
Filing: 1936-09-04
•
Granted: 1940-03-19
•
Expires: 1956-09-04
Abstract
No abstract record available.
Inventors
- 👤 Robert M Bowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/861; C; C03; C03B; C03B11/00; C03B11/06; C03B11/10; C03B11/14; C03B23/00; C03B23/0073; C03B23/20; C03B23/207; C03B23/217; C03C; C03C27/00; C03C27/02; H01J5/00; H01J5/20; H01J9/00; H01J9/24; H01J9/244; H01J2893/00; H01J2893/0033; H01J2893/0037; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/477
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-03-19 | 1943-09-18 | 1944-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-19 | 1947-09-18 | 1948-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-19 | 1951-09-18 | 1952-03-19 | $7700.00 | Window Closed / Lapsed |