US4835016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive bonding
Assignee: United States Department of the Army
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Filing: 1988-03-28
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Granted: 1989-05-30
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Expires: 2008-03-28
Abstract
Abstract A method of pretreating a polyolefin for adhesive bonding. The method involves contacting the polyolefin with a non-chromate solution such as either lead dioxide, potassium iodate or ammonia persulfate in a combination of water and sulfuric acid.
Inventors
- 👤 Roberta Rosty
- 👤 David W. Levi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:42
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
In an improved method of preparing a polyolefin surface for adhesive bonding, the improvement consisting essentially of contacting said polyolefin surface with a non-chromate solution selected from the group consisting of solutions A, B, and C wherein: Solution A is in ratio of about: 6.3 grams lead dioxide, 12 grams water, and 82 mls sulfuric acid; Solution B is in ratio of about 5.5 grams potassium iodate, 12 grams water, 82 mls sulfuric acid; and Solution C is in ratio of about
Claim 2
Dependent Claim
82 words
In an improved method of preparing a polyolefin surface for adhesive bonding, the improvement consisting essentially of contacting said polyolefin surface with a non-chromate solution selected from the group consisting of solutions A, B, and C wherein: Solution A is in ratio of about: 6.3 grams lead dioxide, 12 grams water, and 82 mls sulfuric acid; Solution B is in ratio of about 5.5 grams potassium iodate, 12 grams water, 82 mls sulfuric acid; and Solution C is in ratio of about
Claim 3
Dependent Claim
8 words
4 gram ammonium persulfate 204.1 grams sulfuric acid.
Claim 4
Dependent Claim
8 words
4 gram ammonium persulfate 204.1 grams sulfuric acid.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said solution consists in ratio of about 6.3 g. lead dioxide, 12 g. water, and 82 mls sulfuric acid.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein said solution consists in ratio of about 5.5 g. potassium iodate, 12 g. water, and 82 mls sulfuric acid.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said solution consists in ratio of about 4.4 g. ammonium persulfate, and 204.1 g. sulfuric acid.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |