Patent US4113524A successfully refreshed from Google Patents.
US4113524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of assembling components on printed circuit boards
Assignee: RCA Corp
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Filing: 1977-02-24
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Granted: 1978-09-12
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Expires: 1997-02-24
Abstract
Abstract An improved method of assembling components on printed circuit boards whereby trimmed component leads are placed into holes in the printed circuit board, and an extrudable, non-flowing, heat resistant, completely water soluble mixture is applied over and around the components to keep them in place. The components are then soldered to the board and the extrudable mixture washed away with water. The mixture is made from a solid polyalkylene glycol, an alkali metal soap, glycerine and water.
Inventors
- 👤 George Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/303; H05K3/305; B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; H05K3/306; H05K2203/00; H05K2203/07; H05K2203/0756; H05K2203/0769; H05K2203/0779; H05K2203/0786; H05K3/22; H05K3/28; H05K3/282; H05K3/32; H05K3/34; H05K3/3447; H05K3/3489; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
An extrudable, non-flowing, water soluble composition comprising 100 parts by weight of a solid polyalkylene glycol, from about 10 to about 30 parts by weight of soap, from about 10 to about 30 parts by weight of glycerin and from about 10 to about 100 parts by weight of water.
Claim 2
Dependent Claim
50 words
An extrudable, non-flowing, water soluble composition comprising 100 parts by weight of a solid polyalkylene glycol, from about 10 to about 30 parts by weight of soap, from about 10 to about 30 parts by weight of glycerin and from about 10 to about 100 parts by weight of water.
Claim 3
Dependent Claim
24 words
A composition according to claim 1 wherein said polyalkylene glycol is polyethylene glycol having a molecular weight of from about 600 to about 6000.
Claim 4
Dependent Claim
19 words
A composition according to claim 2 wherein said polyethylene glycol has a molecular weight of about 3000 to 4000.
Claim 5
Dependent Claim
12 words
A composition according to claim 1 wherein said soap is sodium oleate.
Claim 6
Dependent Claim
24 words
A composition according to claim 1 containing about 20 parts of sodium oleate, about 20 parts of glycerin and about 60 parts of water.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |