US3778899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting preformed circuits on flexible dielectric substrates
Assignee: Buckbee Mears Co
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Filing: 1971-11-12
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Granted: 1973-12-18
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Expires: 1991-11-12
Abstract
Abstract A process for preparing preformed circuits for mounting on a flexible dielectric substrate in which the preformed circuit is subject to a strong alkaline bath so as to add oxygen atoms to the surface of the circuit to increase the incidence of hydrogen bonds between the circuits and the dielectric substrate.
Inventors
- 👤 E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:22
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/05; H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/205; B32B15/00; B32B15/20; H05K3/38; H05K3/382; H05K3/385; B32B2457/00; H05K1/00; H05K1/02; H05K1/03; H05K1/0393; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0152; H05K2203/03; H05K2203/0315; H05K2203/07; H05K2203/0703; H05K2203/0726; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49128; Y10T29/49155
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
The process of claim 1 in which said alkaline bath comprises sodium hypochlorite at a temperature in the range of 85* to 95* C.
Claim 2
Dependent Claim
24 words
The process of claim 1 in which said alkaline bath comprises ammonium persulfate at a temperature in the range of 70* to 80* C.
Claim 3
Dependent Claim
22 words
The process of claim 1 including a washing step before the rinsing and drying step so as to remove excess oxidized material.
Claim 4
Dependent Claim
15 words
The process of claim 1 in which said period of time is about 30 seconds.
Claim 5
Dependent Claim
24 words
The process of claim 5 in which said alkaline bath comprises sodium hypochlorite at a temperature in the range of 85* to 95* C.
Claim 6
Dependent Claim
24 words
The process of claim 5 in which said alkaline bath comprises ammonium persulfate at a temperature in the range of 70* to 80* C.
References Cited (Backward Citations)
US2997521A
Cited
US3414487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |