Patent US3994753A successfully refreshed from Google Patents.
US3994753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop-weld composition and method for producing aluminium tube in sheet utilizing the same
Assignee: Altemira Co Ltd
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Filing: 1975-05-12
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Granted: 1976-11-30
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Expires: 1995-05-12
Abstract
Abstract A stop-weld composition for forming a corrosion inhibiting layer on the internal surface of aluminium tube in sheet comprises 2.0 to 50.0% of boron nitride, 0.2 to 10.0% of bentonite, 5.0 to 50.0% of finely divided zinc and the balance solvent.
Inventors
- 👤 Tomiyoshi Kanai
- 👤 Takeshi Katohgi
- 👤 Hitoshi Akiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/18; B21; B21C; B21C37/00; B21C37/06; B21C37/14; B23K35/00; B23K35/22; B23K35/224
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
A stop-weld composition for forming a corrosion inhibiting layer on the internal surface of a tube comprising 2.0 to 50.0% of boron nitride, 0.2 to 10.0% of bentonite, 5.0 to 50.0% of finely divided zinc and the balance solvent.
Claim 2
Dependent Claim
39 words
A stop-weld composition for forming a corrosion inhibiting layer on the internal surface of a tube comprising 2.0 to 50.0% of boron nitride, 0.2 to 10.0% of bentonite, 5.0 to 50.0% of finely divided zinc and the balance solvent.
Claim 3
Dependent Claim
19 words
The composition as claimed in claim 1, in which the stop-weld composition has 10.0 to 40.0% of boron nitride.
Claim 4
Dependent Claim
18 words
The composition as claimed in claim 1, in which the stop-weld composition has 1.0 to 2.5% of bentonite.
Claim 5
Dependent Claim
20 words
The composition as claimed in claim 1, in which the stop-weld composition has 20.0 t 25.0% of finely divided zinc.
Claim 6
Dependent Claim
15 words
The composition as claimed in claim 1 further containing 0.5 to 7.0% of water glass.
Claim 7
Dependent Claim
34 words
The composition as claimed in claim 1 further containing at least one element selected from the group consisting of talc, titanium oxide, magnesium oxide, zinc oxide, kaolin, aluminium oxide and aluminium hydroxide as fillers.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |