US2728702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite cellular plastic structure
Assignee: Lockheed Martin Corp
•
Filing: 1951-07-13
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Granted: 1955-12-27
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Expires: 1971-07-13
Abstract
No abstract record available.
Inventors
- 👤 Simon Eli
- 👤 Frank W Thomas
- 👤 Jr Lloyd A Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:07
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0025; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C70/00; B29C70/68; B29C70/86; B29C70/865; B29K; B29K2105/00; B29K2105/04; B29K2105/06; B29K2105/08; B29K2105/0809; B29L; B29L2031/00; B29L2031/08; B29L2031/087; B29L2031/30; B29L2031/3076; B29L2031/3085; Y; Y10; Y10S; Y10S220/00; Y10S220/14; Y10S220/902; Y10S264/00; Y10S264/53; Y10S273/00; Y10S273/08; Y10S52/00; Y10S52/07; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/24996
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING AN AIRCRAFT CONTROL SURFACE AND THE LIKE COMPRISING THE STEPS OF SHAPING THE SHEET METAL SKIN TO FORM A HOLLOW MEMBER OF THE DESIRED EXTERNAL CONTOUR, APPLYING A LIQUID CEMENT TO THE INTERNAL SURFACE OF SAID SKIN, PRESSING A FIBRE-GLASS CLOTH FABRIC ONTO THE LIQUID CEMENT IN A MANNER TO SECURE SAID FABRIC TO SAID SKIN LEAVING THE INWARD-FACING SIDE OF SAID FABRIC DRY AND SUBSTANTIALLY CEMENT-FREE, DRYING SAID LIQUID CEMENT TO SECURELY BOND ONE SIDE OF SAID FABRIC TO SAID SKIN, POURING A REACTANT PLASTIC MIXTURE INTO THE HOLLOW MEMBER WHICH FOAMS IN PLACE TO FILL SAID HOLLOW MEMBER AND WHICH PENETRATES THE DRY FACE OF SAID FABRIC LINING THE HOLLOW MEMBER TO ADHERE TO THE FIBRES OF SAID FABRIC AND MECHANICALLY INTERLOCK THEREWITH TO FORM A UNITARY STRUCTURE.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING AN AIRCRAFT CONTROL SURFACE AND THE LIKE COMPRISING THE STEPS OF SHAPING THE SHEET METAL SKIN TO FORM A HOLLOW MEMBER OF THE DESIRED EXTERNAL CONTOUR, APPLYING A LIQUID CEMENT TO THE INTERNAL SURFACE OF SAID SKIN, PRESSING A FIBRE-GLASS CLOTH FABRIC ONTO THE LIQUID CEMENT IN A MANNER TO SECURE SAID FABRIC TO SAID SKIN LEAVING THE INWARD-FACING SIDE OF SAID FABRIC DRY AND SUBSTANTIALLY CEMENT-FREE, DRYING SAID LIQUID CEMENT TO SECURELY BOND ONE SIDE OF SAID FABRIC TO SAID SKIN, POURING A REACTANT PLASTIC MIXTURE INTO THE HOLLOW MEMBER WHICH FOAMS IN PLACE TO FILL SAID HOLLOW MEMBER AND WHICH PENETRATES THE DRY FACE OF SAID FABRIC LINING THE HOLLOW MEMBER TO ADHERE TO THE FIBRES OF SAID FABRIC AND MECHANICALLY INTERLOCK THEREWITH TO FORM A UNITARY STRUCTURE.
Claim 3
Dependent Claim
80 words
AN AIRCRAFT STRUCTURE COMPRISING A SHEET METAL SKIN SHAPED TO FORM A HOLLOW MEMBER OF THE DESIRED EXTERNAL CONTOUR, A FIBRE-GLASS CLOTH LAYER LINING THE INTERNAL SURFACE OF SAID SHEET METAL SKIN, A CEMENT LAYER SECURING ONE FACE ONLY OF SAID FIBRE-GLASS CLOTH LAYER TO SAID SKIN, A CAST-INPLACE CORE OF FOAMED IN SITU REACTANT PLASTIC MIXTURE FILLING THE SAID HOLLOW MEMBER ADHERED TO AND MECHANICALLY INTERLOCKED WITH THE INNER FACE OF SAID FARBIC LAYER TO FORM A UNITARY STRUCTURE.
Claim 4
Dependent Claim
80 words
AN AIRCRAFT STRUCTURE COMPRISING A SHEET METAL SKIN SHAPED TO FORM A HOLLOW MEMBER OF THE DESIRED EXTERNAL CONTOUR, A FIBRE-GLASS CLOTH LAYER LINING THE INTERNAL SURFACE OF SAID SHEET METAL SKIN, A CEMENT LAYER SECURING ONE FACE ONLY OF SAID FIBRE-GLASS CLOTH LAYER TO SAID SKIN, A CAST-INPLACE CORE OF FOAMED IN SITU REACTANT PLASTIC MIXTURE FILLING THE SAID HOLLOW MEMBER ADHERED TO AND MECHANICALLY INTERLOCKED WITH THE INNER FACE OF SAID FARBIC LAYER TO FORM A UNITARY STRUCTURE.
References Cited (Backward Citations)
US1372478A
Cited
US1549320A
Cited
US1507143A
Cited
US1769005A
Cited
US1885364A
Cited
US1802985A
Cited
US2068533A
Cited
US2329366A
Cited
US2377846A
Cited
US2414125A
Cited
US2446429A
Cited
US2461761A
Cited
US2552641A
Cited
US2576073A
Cited
US2504421A
Cited
US2566701A
Cited
US2484141A
Cited
US2655459A
Cited
US2602783A
Cited
US2628654A
Cited
US2629678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |