US3247627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual wall air inflated structure
Assignee: Birdair Structures Inc
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Filing: 1965-04-26
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Granted: 1966-04-26
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Walter W Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/20; E04H2015/202; E04H2015/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A BUILDING ARCH OF DUAL WALL FORM COMPRISING, OPPOSED INNER AND OUTER WALL MEMBERS OF FLEXIBLE, IMPERVIOUS MATERIAL JOINED MARGINALLY THEREOF TO PROVIDE A SUBSTANTIALLY AIRTIGHT ENVELOPE, A PLURALITY OF SPACED, GENERALLY PARALLEL, RESILIENT, AND FLEXIBLE STRIP-LIKE WEB MEMBERS EXTENDING LONGITUDINALLY OF THE ARCH SUBSTANTIALLY COEXTENSIVE THEREWITH, MEANS JOINING SAID WEB MEMBERS ALONG THEIR OPPOSITE SIDE EDGES TO THE RESPECTIVE INNER SURFACES OF SAID WALL MEMBERS TO INTEGRATE THE WALL MEMBERS TO THE WEB MEMBERS, SAID WEB MEMBERS INCLUDING MEANS FOR MAINTAINING THE WEN MEMBERS IN LONGITUDINALLY RELAXED CONDITION RELATIVE TO SAID WALL MEMBERS WHEREBY THE WALL MEMBERS RESIST ELONGATION IN THE LONGITUDINAL DIRECTION TO A MATERIALLY GREATER EXTENT THAN DO THE WEB MEMBERS RESIST SUCH ELONGATION WHEN SAID ENVELOPE IS INFLATED, SAID WEB MEMBERS BEING SPACED APART DISTANCES IN THE ORDER OF THEIR WIDTHS.
Claim 2
Dependent Claim
135 words
A BUILDING ARCH OF DUAL WALL FORM COMPRISING, OPPOSED INNER AND OUTER WALL MEMBERS OF FLEXIBLE, IMPERVIOUS MATERIAL JOINED MARGINALLY THEREOF TO PROVIDE A SUBSTANTIALLY AIRTIGHT ENVELOPE, A PLURALITY OF SPACED, GENERALLY PARALLEL, RESILIENT, AND FLEXIBLE STRIP-LIKE WEB MEMBERS EXTENDING LONGITUDINALLY OF THE ARCH SUBSTANTIALLY COEXTENSIVE THEREWITH, MEANS JOINING SAID WEB MEMBERS ALONG THEIR OPPOSITE SIDE EDGES TO THE RESPECTIVE INNER SURFACES OF SAID WALL MEMBERS TO INTEGRATE THE WALL MEMBERS TO THE WEB MEMBERS, SAID WEB MEMBERS INCLUDING MEANS FOR MAINTAINING THE WEN MEMBERS IN LONGITUDINALLY RELAXED CONDITION RELATIVE TO SAID WALL MEMBERS WHEREBY THE WALL MEMBERS RESIST ELONGATION IN THE LONGITUDINAL DIRECTION TO A MATERIALLY GREATER EXTENT THAN DO THE WEB MEMBERS RESIST SUCH ELONGATION WHEN SAID ENVELOPE IS INFLATED, SAID WEB MEMBERS BEING SPACED APART DISTANCES IN THE ORDER OF THEIR WIDTHS.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |