US3129648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast pressure control and air filter means for underground shelters
Assignee: Individual
•
Filing: 1961-11-10
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Granted: 1964-04-21
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Expires: 1981-11-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:51
CPC Classifications
A; A62; A62B; A62B13/00; Y; Y10; Y10S; Y10S454/00; Y10S454/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN AIR BLAST CONTROL MEANS, A SUBSTANTIALLY SEMI-SPHERICAL HEAVY CONCRETE BLAST DOME CAPABLE OF BEING SUPPORTED SUBSTANTIALLY AT GROUND LEVEL WITH ITS CONVEX SIDE UPPERMOST, SAID BLAST DOME HAVING IN ITS LOWER CENTRAL PORTION AN AIR CHAMBER ADAPTED FOR COMMUNICATIVE CONNECTION WITH AN UNDERGROUND AIR CIRCULATION CONDUIT; A PLURALITY OF RADIALLY DISPOSED SUBSTANTIALLY UNIFORMLY SPACED APART AIR TUBES OF SMALL DIAMETER EMBEDDED IN SAID DOME AND EXTENDING BETWEEN SAID AIR CHAMBER AND THE EXTERIOR WALL OF SAID DOME PROVIDING A PLURALITY OF SMALL AIR INTAKE OPENINGS DISTRIBUTED AROUND SAID DOME AND TERMINATING IN GENERALLY UPRIGHT PORTIONS OF THE EXTERNAL WALL OF SAID DOME, SAID AIR CHAMBER BEING OF MUCH SMALLER CROSS SEC-
Claim 2
Dependent Claim
112 words
IN AIR BLAST CONTROL MEANS, A SUBSTANTIALLY SEMI-SPHERICAL HEAVY CONCRETE BLAST DOME CAPABLE OF BEING SUPPORTED SUBSTANTIALLY AT GROUND LEVEL WITH ITS CONVEX SIDE UPPERMOST, SAID BLAST DOME HAVING IN ITS LOWER CENTRAL PORTION AN AIR CHAMBER ADAPTED FOR COMMUNICATIVE CONNECTION WITH AN UNDERGROUND AIR CIRCULATION CONDUIT; A PLURALITY OF RADIALLY DISPOSED SUBSTANTIALLY UNIFORMLY SPACED APART AIR TUBES OF SMALL DIAMETER EMBEDDED IN SAID DOME AND EXTENDING BETWEEN SAID AIR CHAMBER AND THE EXTERIOR WALL OF SAID DOME PROVIDING A PLURALITY OF SMALL AIR INTAKE OPENINGS DISTRIBUTED AROUND SAID DOME AND TERMINATING IN GENERALLY UPRIGHT PORTIONS OF THE EXTERNAL WALL OF SAID DOME, SAID AIR CHAMBER BEING OF MUCH SMALLER CROSS SEC-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |