Patent US3580810A successfully refreshed from Google Patents.
Patent US3561174A successfully refreshed from Google Patents.
US3561174A
Expired / Lapsed
US
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Air-supported structure
Assignee: Individual
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Filing: 1968-02-19
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Granted: 1971-02-09
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Expires: 1988-02-19
Abstract
Abstract THE ROOF OF AN AIR-SUPPORTED STRUCTURE IS PROVIDED A LIFT-COUNTERACTING EXHAUST CROWN TO COUNTERACT THE TENDENCY OF HIGH VELOCITY WINDS ACROSS THE ROOF TO "FLY" THE ROOF OF ITS BASE ANCHOR. AN AIR STRUCTURE IS ALSO PROVIDED WITH A DYNAMIC AIR DOOR WHICH CAN REMAIN OPEN CONTINUOUSLY FOR INGRESS AND EGRESS WITHOUT LOSS OF AIR PRESSURE WITHIN THE STRUCTURE. THE AIR SUPPORTED STRUCTURE CAN BE A CIRCULAR DOME-SHAPED CONFIGURATION OR IT CAN BE OF RECTANGULAR VAULTED CONFIGURATION.
Inventors
- 👤 Jon G Schneidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:17
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/20; E04H15/22
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |