US2642920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for electrical apparatus
Assignee: Lockheed Martin Corp
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Filing: 1950-10-04
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Granted: 1953-06-23
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Expires: 1970-10-04
Abstract
No abstract record available.
Inventors
- 👤 Simon Eli
- 👤 Frank W Thomas
- 👤 Edward H Burkart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:11
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/302; Y; Y10; Y10S; Y10S138/00; Y10S138/09; Y10S264/00; Y10S264/53; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249961; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31536; Y10T428/31551; Y10T428/31616; Y10T428/3162; Y10T442/00; Y10T442/30; Y10T442/3325; Y10T442/335; Y10T442/3366; Y10T442/60; Y10T442/647; Y10T442/652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ARTICLE OF MANUFACTURE COMPRISING SPACED SKIN LAMINATIONS OF FIBROUS MATERIALS, LAMINATING PLASTIC IMPREGNATED IN SAID MATERIALS, AND A CORE LAYER OF CELLULAR PLASTIC MATERIAL CAST BETWEEN SAID SKIN LAMINATIONS, THERE BEING INTERFACIAL ZONES AT THE PLANES OF JOINDER OF THE CORE LAYER AND SKIN LAMINATIONS CONTAINING SAID LAMINATING PLASTIC, SAID PLASTIC MATERIAL OF THE CORE LAYER, AND A COPOLYMER OF THE SAME.
Claim 2
Dependent Claim
63 words
AN ARTICLE OF MANUFACTURE COMPRISING SPACED SKIN LAMINATIONS OF FIBROUS MATERIALS, LAMINATING PLASTIC IMPREGNATED IN SAID MATERIALS, AND A CORE LAYER OF CELLULAR PLASTIC MATERIAL CAST BETWEEN SAID SKIN LAMINATIONS, THERE BEING INTERFACIAL ZONES AT THE PLANES OF JOINDER OF THE CORE LAYER AND SKIN LAMINATIONS CONTAINING SAID LAMINATING PLASTIC, SAID PLASTIC MATERIAL OF THE CORE LAYER, AND A COPOLYMER OF THE SAME.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |