US2820082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielding device
Assignee: Gray Stamping & Manufacturing Co
•
Filing: 1952-07-09
•
Granted: 1958-01-14
•
Expires: 1972-07-09
Abstract
No abstract record available.
Inventors
- 👤 Linsley S Gray
- 👤 Lester W Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:53
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/12; Y; Y10; Y10T; Y10T403/00; Y10T403/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1748772A
Cited
FR754773A
Cited
US2080913A
Cited
US2120024A
Cited
US2379898A
Cited
US2499612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |