Patent US2525020A successfully refreshed from Google Patents.
US3381432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stressed-skin span structure
Assignee: INVENTOR S GROUP
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Filing: 1966-09-19
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Granted: 1968-05-07
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Brandwein Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:25
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04C; E04C3/00; E04C3/38; E04C3/40; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A SELF-SUPPORTING STRESSED-SKIN SPAN STRUCTURE COMPRISING: AT LEAST TWO LAYERS OF LONGITUDINALLY EXTENDING CHANNELSHAPED BEAM MEMBERS EACH BEAM MEMBER COMPRISING A LONGITUDINALLY EXTENDING MAIN BODY PORTION AND UPSTANDING SIDE RAIL PORTIONS DISPOSED ALONG THE LONGITUDINAL EDGES OF SAID MAIN BODY PORTION GENERALLY PERPENDICULAR THERETO, SAID CHANNEL-SHAPED BEAM MEMBERS IN EACH LAYER BEING DISPOSED SIDE BY SIDE IN CONTACT WITH EACH OTHER WITH THE OPEN CHANNEL OF EACH BEAM MEMBER FACING UPWARDLY AND WITH THE MAIN BODY PORTIONS OF ADJOINING BEAM MEMBERS IN SUBSTANTIAL HORIZONTAL ALIGNMENT, THE CHANNEL-SHAPED BEAM MEMBERS IN ADJACENT LAYERS BEING DISPOSED WITH THE UPPER LONGITUDINAL EDGES OF THE UPSTANDING SIDE RAIL PORTIONS OF THE BEAM MEMBERS IN THE UNDERLYING LAYER SECURED TO THE UNDERSIDE OF THE MAIN BODY PORTIONS OF THE CHANNEL-SHAPED BEAM MEMBERS DISPOSED IMMEDIATELY THEREOVER, WHEREBY THE LONGITUDINALLY EXTENDING MAIN BODY PORTIONS OF THE BEAM MEMBERS IN ONE LAYER AND THE LONGITUDINALLY EXTENDING MAIN BODY PORTIONS OF THE BEAM MEMBERS IN ADJOINING LAYERS OF SAID BEAM MEMBERS FORM A STRESSED-SKIN STRUCTURE THAT IS CAPABLE OF SUPPORTING LOADS SUBSTANTIALLY IN EXCESS OF THE AGGREGATE LOAD THAT CAN BE SUPPORTED BY THE INDIVIDUAL COMPONENTS OF THE SPAN STRUCTURE.
Claim 2
Dependent Claim
191 words
A SELF-SUPPORTING STRESSED-SKIN SPAN STRUCTURE COMPRISING: AT LEAST TWO LAYERS OF LONGITUDINALLY EXTENDING CHANNELSHAPED BEAM MEMBERS EACH BEAM MEMBER COMPRISING A LONGITUDINALLY EXTENDING MAIN BODY PORTION AND UPSTANDING SIDE RAIL PORTIONS DISPOSED ALONG THE LONGITUDINAL EDGES OF SAID MAIN BODY PORTION GENERALLY PERPENDICULAR THERETO, SAID CHANNEL-SHAPED BEAM MEMBERS IN EACH LAYER BEING DISPOSED SIDE BY SIDE IN CONTACT WITH EACH OTHER WITH THE OPEN CHANNEL OF EACH BEAM MEMBER FACING UPWARDLY AND WITH THE MAIN BODY PORTIONS OF ADJOINING BEAM MEMBERS IN SUBSTANTIAL HORIZONTAL ALIGNMENT, THE CHANNEL-SHAPED BEAM MEMBERS IN ADJACENT LAYERS BEING DISPOSED WITH THE UPPER LONGITUDINAL EDGES OF THE UPSTANDING SIDE RAIL PORTIONS OF THE BEAM MEMBERS IN THE UNDERLYING LAYER SECURED TO THE UNDERSIDE OF THE MAIN BODY PORTIONS OF THE CHANNEL-SHAPED BEAM MEMBERS DISPOSED IMMEDIATELY THEREOVER, WHEREBY THE LONGITUDINALLY EXTENDING MAIN BODY PORTIONS OF THE BEAM MEMBERS IN ONE LAYER AND THE LONGITUDINALLY EXTENDING MAIN BODY PORTIONS OF THE BEAM MEMBERS IN ADJOINING LAYERS OF SAID BEAM MEMBERS FORM A STRESSED-SKIN STRUCTURE THAT IS CAPABLE OF SUPPORTING LOADS SUBSTANTIALLY IN EXCESS OF THE AGGREGATE LOAD THAT CAN BE SUPPORTED BY THE INDIVIDUAL COMPONENTS OF THE SPAN STRUCTURE.
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |