US4312906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop-off composition for metals
Assignee: Boeing Co
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Filing: 1980-06-16
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Granted: 1982-01-26
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Expires: 2000-06-16
Abstract
Abstract A filler of polyisobutylene dissolved in a solvent is combined with boron nitride to form a stop-off compound used as a parting agent when diffusion bonding metals. A uniform coating of the compound is applied with screen printing methods prior to bonding.
Inventors
- 👤 Charles R. Arnold
- 👤 Donald A. Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:50
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/224; B23K20/00; B23K20/18; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24893; Y10T428/24909; Y10T428/24917; Y10T428/25; Y10T428/256; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
An article of manufacture comprising: a layered metal structure, a coating arranged in patterns between contiguous layers of the metal with said coating comprising a powdered boron nitride dispersed in a viscous liquid of polyisobutylene dissolved in xylene and toluene.
Claim 2
Dependent Claim
40 words
An article of manufacture comprising: a layered metal structure, a coating arranged in patterns between contiguous layers of the metal with said coating comprising a powdered boron nitride dispersed in a viscous liquid of polyisobutylene dissolved in xylene and toluene.
Claim 3
Dependent Claim
58 words
An article of manufacture comprising a layered metal structure, a coating arranged in patterns between contiguous layers of the metal with said coating comprising 11 to 14 parts boron nitride dispersed in a viscous liquid of 1 part polyisobutylene dissolved in 6 to 8 parts xylene and 5 to 7 parts toluene with all parts being by weight.
Claim 4
Dependent Claim
58 words
An article of manufacture comprising a layered metal structure, a coating arranged in patterns between contiguous layers of the metal with said coating comprising 11 to 14 parts boron nitride dispersed in a viscous liquid of 1 part polyisobutylene dissolved in 6 to 8 parts xylene and 5 to 7 parts toluene with all parts being by weight.
Claim 5
Dependent Claim
44 words
An article of manufacture comprising: a layered titanium structure, a coating arranged by silkscreen methods in intricate patterns between contigous layers of the titanium with said coating comprising a powdered boron nitride dispersed in a viscous liquid of polyisobutylene dissolved in xylene and toluene.
Claim 6
Dependent Claim
44 words
An article of manufacture comprising: a layered titanium structure, a coating arranged by silkscreen methods in intricate patterns between contigous layers of the titanium with said coating comprising a powdered boron nitride dispersed in a viscous liquid of polyisobutylene dissolved in xylene and toluene.
Claim 7
Dependent Claim
62 words
An article of manufacture comprising a layered titanium structure, a coating arranged by silkscreen methods in intricate patterns between contiguous layers of the titanium with said coating comprising 11 to 14 parts boron nitride dispersed in a viscous liquid of 1 part polyisobutylene dissolved in 6 to 8 parts xylene and 5 to 7 parts toluene with all parts being by weight.
Claim 8
Dependent Claim
62 words
An article of manufacture comprising a layered titanium structure, a coating arranged by silkscreen methods in intricate patterns between contiguous layers of the titanium with said coating comprising 11 to 14 parts boron nitride dispersed in a viscous liquid of 1 part polyisobutylene dissolved in 6 to 8 parts xylene and 5 to 7 parts toluene with all parts being by weight.
References Cited (Backward Citations)
US3214251A
Cited
US3927817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |