Patent US1969063A successfully refreshed from Google Patents.
US2805974A
Expired / Lapsed
US
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Method of making radar reflector
Assignee: Zenith Plastics Co
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Filing: 1955-10-17
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Granted: 1957-09-10
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Brucker Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/342; B29C70/06; B29C70/08; B29C70/088; B29C70/40; B29C70/42; B29C70/44; B29D; B29D24/00; B29D24/002; B29D24/005; B32; B32B; B32B15/00; B32B15/04; B32B15/08; G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; H01Q15/142; H01Q15/144; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29L; B29L2031/00; B29L2031/34; B29L2031/3456; Y; Y10; Y10S; Y10S138/00; Y10S138/10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T156/1028; Y10T156/103; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF MAKING A RADAR REFLECTOR COMPRISING FORMING AND RETAINING A LAYER OF RESINOUS MATERIAL IN A GENERALLY DISH-SHAPED CONDIDTION, CURING SAID RESIN, SANDBLASTING THE OUTER CURVED SURFACE OF SAID RESIN, SPRAYING A METAL UNIFORMLY OVER THE SANDBLASTED SURFACE, PERMITTING SAID METAL TO HARDEN ON SAID SURFACE, IMPREGNATING THE SURFACE OF SAID SPRAYED LAYER OF METAL WITH SUCH THERMOSETTING RESIN, IMPREGNATING A FIBERGLASS CLOTH WITH SAID RESIN AND APPLYING THE IMPREGNATED CLOTH TO SAID IMPREGNATED SPRAYED METAL SURFACE, APPLYING A CELLULAR SUBSTANTIALLY RIGID MEMBER ON THE OUTER SURFACE OF THE IMPREGNATED FIBERGLASS CLOTH LAYER, IMPREGNATING A SECOND FIBERGLASS CLOTH WITH SAID RESIN AND APPLYING SAID CLOTH OVER SAID CELLULAR MEMBER, REMOVING ENTRAPPED AIR AND PRESSING ALL OF SAID LAYERS RADIALLY TOGETHER AND CURING SAID RESIN IN AND BETWEEN SAID LAYERS, TRIMMING THE MARGINAL EDGE OF THE RESULTANT CURED MASS, IMPREGNATING A FIBERGLASS MATERIAL WITH A THERMO-SETTING RESIN AND APPLYING SAID MATERIAL OVER SAID TRIMMED EDGE, AND CURING SAID LAST MENTIONED RESIN IN PLACE.
Claim 2
Independent Claim
164 words
THE METHOD OF MAKING A RADAR REFLECTOR COMPRISING FORMING AND RETAINING A LAYER OF RESINOUS MATERIAL IN A GENERALLY DISH-SHAPED CONDIDTION, CURING SAID RESIN, SANDBLASTING THE OUTER CURVED SURFACE OF SAID RESIN, SPRAYING A METAL UNIFORMLY OVER THE SANDBLASTED SURFACE, PERMITTING SAID METAL TO HARDEN ON SAID SURFACE, IMPREGNATING THE SURFACE OF SAID SPRAYED LAYER OF METAL WITH SUCH THERMOSETTING RESIN, IMPREGNATING A FIBERGLASS CLOTH WITH SAID RESIN AND APPLYING THE IMPREGNATED CLOTH TO SAID IMPREGNATED SPRAYED METAL SURFACE, APPLYING A CELLULAR SUBSTANTIALLY RIGID MEMBER ON THE OUTER SURFACE OF THE IMPREGNATED FIBERGLASS CLOTH LAYER, IMPREGNATING A SECOND FIBERGLASS CLOTH WITH SAID RESIN AND APPLYING SAID CLOTH OVER SAID CELLULAR MEMBER, REMOVING ENTRAPPED AIR AND PRESSING ALL OF SAID LAYERS RADIALLY TOGETHER AND CURING SAID RESIN IN AND BETWEEN SAID LAYERS, TRIMMING THE MARGINAL EDGE OF THE RESULTANT CURED MASS, IMPREGNATING A FIBERGLASS MATERIAL WITH A THERMO-SETTING RESIN AND APPLYING SAID MATERIAL OVER SAID TRIMMED EDGE, AND CURING SAID LAST MENTIONED RESIN IN PLACE.
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |