Patent US4622237A successfully refreshed from Google Patents.
US4622237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flame activation of substrates
Assignee: Individual
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Filing: 1985-06-11
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Granted: 1986-11-11
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Expires: 2005-06-11
Abstract
Abstract Physical method for the treatment of the surfaces of polyolefinic plastic laminates, polytetrafluoroethylene (PTFE), cardboards and metal sheets such as, particularly, aluminium and tinplate, of any thicknesses and widths, by means of a flame produced by the combustion of a mixture of air-hydrocarbon gas, characterized in that such a mixture is enriched with pure oxygen gas.
Inventors
- 👤 Giulio Lori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:16
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/08; B29; B29C; B29C59/00; B29C59/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
32 words
A method of treatment of surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals comprising, treating said surfaces with an electrically excited flame of a burning gaseous mixture.
Claim 2
Independent Claim
32 words
A method of treatment of surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals comprising, treating said surfaces with an electrically excited flame of a burning gaseous mixture.
Claim 3
Dependent Claim
35 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metal according to claim 1, in which the burning gaseous mixture flame is excited by direct current.
Claim 4
Dependent Claim
34 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metal according to claim 1, in which the gaseous mixture is composed of an air-hydrocarbon gas.
Claim 5
Dependent Claim
34 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metal according to claim 1, in which the gaseous mixture is enriched with pure oxygen gas.
Claim 6
Dependent Claim
38 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which the gaseous mixture is enriched with pure oxygen gas in a Ventrui mixer.
Claim 7
Dependent Claim
34 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, including constantly checking the flame with an analyzer of thermal power.
Claim 8
Dependent Claim
30 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, including injecting steam into the gaseous mixture.
Claim 9
Dependent Claim
35 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, including introducing traces of alkaline and alkaline-earth metals into said gaseous mixture.
Claim 10
Dependent Claim
46 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which said objects are films, sheets, plates, coextruded laminates, expanded materials, corrugated, interwoven, tissued and non-tissued, of any thickness, width and length.
Claim 11
Dependent Claim
30 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which said plastic materials are polyoleofins.
Claim 12
Dependent Claim
31 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards, or metals according to claim 10, in which said polyoleofine are polypropylene and polyethylene.
Claim 13
Dependent Claim
31 words
A method of treatement of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1 in which said plastic materials are fluorinated polymers.
Claim 14
Dependent Claim
32 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 12 in which said fluorinated polymers are made of TEFLON(PTFE).
Claim 15
Dependent Claim
31 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which said metals are aluminum and tin.
Claim 16
Dependent Claim
29 words
A method of treatment of the surfaces of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which said objects are latten.
Claim 17
Dependent Claim
33 words
A method of treatment of the surface of objects made of plastic materials, resins, rubbers, papers, cardboards or metals according to claim 1, in which said objects are expanded polypropylene and polyethylene films.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |