US2820616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized electronic case
Assignee: Individual
•
Filing: 1952-09-03
•
Granted: 1958-01-21
•
Expires: 1972-09-03
Abstract
No abstract record available.
Inventors
- 👤 Emerson E Nabal
- 👤 William J Steinmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20009; H05K7/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511875A
Cited
GB279828A
Cited
US1804624A
Cited
US2273244A
Cited
US2362044A
Cited
US2654583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |