US2832676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making thin-walled reentrant structure
Assignee: North American Aviation Corp
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Filing: 1956-01-05
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Granted: 1958-04-29
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Expires: 1976-01-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Clay H Llewellyn
- 👤 Richard D Welsh
- 👤 Stephen A Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:53
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF MAKING A THIN-WALLED STRUCTURE HAVING REENTRANT PORTIONS ON THE SURFACE THEREOF COMPRISING FIRST FORMING A METAL CORE PORTION HAVING AN EXTERIOR CONFIGURATION INCLUDING DESIRED REENTRANT PORTIONS, CHEMICALLY PLATING A THIN LAYER OF A DISSIMILAR METAL CHOSEN FROM THE GROUP CONSISTING OF NICKEL AND COBALT ON THE EXTERIOR OF SAID CORE PORTION AND INTO SAID REENTRANT PORTIONS, AND SELECTIVELY ETCHING AWAY THE CORE PORTION WHERBY SAID LAYER FORMS SAID THIN-WALLED STRUCTURE.
Claim 2
Independent Claim
73 words
THE METHOD OF MAKING A THIN-WALLED STRUCTURE HAVING REENTRANT PORTIONS ON THE SURFACE THEREOF COMPRISING FIRST FORMING A METAL CORE PORTION HAVING AN EXTERIOR CONFIGURATION INCLUDING DESIRED REENTRANT PORTIONS, CHEMICALLY PLATING A THIN LAYER OF A DISSIMILAR METAL CHOSEN FROM THE GROUP CONSISTING OF NICKEL AND COBALT ON THE EXTERIOR OF SAID CORE PORTION AND INTO SAID REENTRANT PORTIONS, AND SELECTIVELY ETCHING AWAY THE CORE PORTION WHERBY SAID LAYER FORMS SAID THIN-WALLED 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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |