US3921885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding two bodies together
Assignee: RCA Corp
•
Filing: 1973-06-28
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Granted: 1975-11-25
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Expires: 1993-06-28
Abstract
Abstract A surface of each of the bodies is coated with a layer of gold. The bodies are placed in a chamber which is evacuated to a pressure of at least 10 3 torr. While maintaining the chamber and its contents at room temperature, the gold layers are brought into contacting relation and a pressure of between 800 psi and 2500 psi is applied to the bodies to bond the gold layers together.
Inventors
- 👤 Joseph Dale Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K20/00; B23K20/16; H; H10; H10N; H10N30/00; H10N30/01; H10N30/07; H10N30/072; H10N30/073
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A METHOD OF BONDING TOGETHER TWO BODIES OF AN ACOUSTIC MATERIAL COMPRISING THE STEPS OF APPLYING A LAYER OF GOLD ON A SURFACE OF EACH OF THE BODIES, PLACING THE BODIES IN A CHAMBER, EVACUATING SAID CHAMBER TO A PRESSURE OF AT LEAST 10**-3 TORR, BRINGING THE GOLD LAYERS INTO CONTACTING RELATION, AND WITH THE BODIES BEING AT ROOM TEMPERATURE APPLYING A PRESSURE OF 800 TO 1600 PSI TO SAID BODIES FOR A TIME SUFFICIENT TO BOND THE GOLD ALYERS TOGETHER.
Claim 2
Independent Claim
81 words
A METHOD OF BONDING TOGETHER TWO BODIES OF AN ACOUSTIC MATERIAL COMPRISING THE STEPS OF APPLYING A LAYER OF GOLD ON A SURFACE OF EACH OF THE BODIES, PLACING THE BODIES IN A CHAMBER, EVACUATING SAID CHAMBER TO A PRESSURE OF AT LEAST 10**-3 TORR, BRINGING THE GOLD LAYERS INTO CONTACTING RELATION, AND WITH THE BODIES BEING AT ROOM TEMPERATURE APPLYING A PRESSURE OF 800 TO 1600 PSI TO SAID BODIES FOR A TIME SUFFICIENT TO BOND THE GOLD ALYERS TOGETHER.
Claim 3
Dependent Claim
30 words
A method in accordance with claim 1 including providing a layer of aluminum over each of said surfaces of the bodies and coating the gold layer on the aluminum layer.
Claim 4
Dependent Claim
40 words
The method in accordance with claim 2 including coating each of said surfaces of the bodies with a metal adhesive layer selected from the group consisting of chromium, molybdenum and titanium and coating the aluminum layers on the adhesive layers.
References Cited (Backward Citations)
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Cited
US3252722A
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US3590467A
Cited
US3599123A
Cited
US3791028A
Cited
US3798746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |