US2955549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atomic explosion shelter
Assignee: ASSOCIATED NUCLEONICS Inc
•
Filing: 1955-05-04
•
Granted: 1960-10-11
•
Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Frankfort Jacob Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:08
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10; E04H9/12; Y; Y10; Y10S; Y10S454/00; Y10S454/902
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |