US3926745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition of p' 2'o' 5 'in an electrolytic moisture cell
Assignee: TA Instruments Inc
•
Filing: 1974-04-09
•
Granted: 1975-12-16
•
Expires: 1994-04-09
Abstract
Abstract Deposition of P2O5 on an electrically nonconductive substrate disposed between two electrodes, particularly in the formation of an electrolytic cell, is accomplished by passing gaseous phosphorus over a substrate, in the presence of water, while maintaining a potential between the electrodes sufficient to electrolyze the water and form P2O5 on the surface of the substrate in the region between the electrodes.
Inventors
- 👤 Jr Michael Czuha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:16
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/18; H01M8/184; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/423; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
66 words
A METHOD OF DEPOSITING PHOSPHORUS PENTOXIDE ON AN ELECTRICALLY NONCONDUCTIVE SUBSTRATE DISPOSED BETWEEN TWO ELECTRODES COMPRISING THE STEPS OF: A. CONTACTING SAID ELECTRODES AND SAID SUBSTRATE, IN THE PRESENCE OF WATER VAPOR, WITH GASEOUS PHOSPHORUS; AND B. APPLYING AN ELECTRIC POTENTIAL BETWEEN SAID ELECTARODES OF SUFFICIENT STRENGTH TO ELECTROLYZE THE WATER VAPOR AND FORM PHOSPHORUS PENTOXIDE ON SAID SUBSTRATE ONLY IN THE REGION BETWEEN SAID ELECTRODES.
Claim 2
Independent Claim
66 words
A METHOD OF DEPOSITING PHOSPHORUS PENTOXIDE ON AN ELECTRICALLY NONCONDUCTIVE SUBSTRATE DISPOSED BETWEEN TWO ELECTRODES COMPRISING THE STEPS OF: A. CONTACTING SAID ELECTRODES AND SAID SUBSTRATE, IN THE PRESENCE OF WATER VAPOR, WITH GASEOUS PHOSPHORUS; AND B. APPLYING AN ELECTRIC POTENTIAL BETWEEN SAID ELECTARODES OF SUFFICIENT STRENGTH TO ELECTROLYZE THE WATER VAPOR AND FORM PHOSPHORUS PENTOXIDE ON SAID SUBSTRATE ONLY IN THE REGION BETWEEN SAID ELECTRODES.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said substrate is a porous substrate and the step of contacting said electrodes and said substrate with gaseous phosphorus is accomplished by flowing gaseous phosphorus through the pores in said substrate.
Claim 4
Dependent Claim
34 words
The method of claim 1 wherein said substrate is a non-porous substrate, and the step of contacting said electrodes and said substrate with gaseous phosphorus is accomplished by flowing gaseous phophorus over said substrate.
Claim 5
Dependent Claim
53 words
The method of claim 1 wherein said substrate is a non-porous substrate and said electrodes are thin interdigitated ribbon electrodes deposited on one surface of said substrate, and wherein the step of contacting said electrodes and said substrate with gaseous phosphorus is accomplished by flowing gaseous phosphorus over said substrate and said electrodes.
Claim 6
Dependent Claim
38 words
The method of claim 4 wherein said water vapor and said gaseous phosphorus are brought into contact with said electrodes and substrate by passing an inert gas through an aqueous phosphoric acid solution in contact with molten phosphorus.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein said aqueous phosphoric acid solution contains at least about 50% by weight of phosphoric acid.
Claim 8
Dependent Claim
21 words
The method of claim 5 wherein said aqueous phosphoric acid solution is maintained at a temperature of at least about 50*C.
Claim 9
Dependent Claim
24 words
The method of claim 4 wherein the electric potential applied between said electrodes is within the range of about 40 to about 100 volts.
Claim 10
Dependent Claim
21 words
The method of claim 8 further comprising the step of reversing the polarity of the electric potential applied to said electrodes.
Claim 11
Dependent Claim
26 words
The method of claim 8 wherein the polarity of the electric potential is reversed at a rate of about 4 to about 15 times a minute.
Claim 12
Dependent Claim
30 words
The method of claim 8 wherein the electric potential is removed from said electrodes when the current between said electrodes reaches a level of about 5 to about 10 milliamps.
Claim 13
Independent Claim
138 words
A method of depositing phosphorus pentoxide on the surface of an electrically nonconductive substrate disposed between thin ribbon electrodes attached to and supported by said substrate to form an electrolytic moisture cell, comprising the steps of: a. pAssing an inert gas through an aqueous phosphoric acid solution containing at least about 50% by weight of phosphoric acid and maintained at a temperature of at least about 50*C. to produce water vapor and gaseous phosphorus, sad aqueous phosphoric acid solution being in contact with molten phosphorus; b. contacting said electrodes and substrate with said water vapor and gaseous phosphorus; and c. applying an electric potential of about 40 to about 100 volts between said electrodes, when in contact with said water vapor and gaseous phosphorus to form phosphorus pentoxide on said substrate only in the region between said electrode.
Claim 14
Independent Claim
138 words
A method of depositing phosphorus pentoxide on the surface of an electrically nonconductive substrate disposed between thin ribbon electrodes attached to and supported by said substrate to form an electrolytic moisture cell, comprising the steps of: a. pAssing an inert gas through an aqueous phosphoric acid solution containing at least about 50% by weight of phosphoric acid and maintained at a temperature of at least about 50*C. to produce water vapor and gaseous phosphorus, sad aqueous phosphoric acid solution being in contact with molten phosphorus; b. contacting said electrodes and substrate with said water vapor and gaseous phosphorus; and c. applying an electric potential of about 40 to about 100 volts between said electrodes, when in contact with said water vapor and gaseous phosphorus to form phosphorus pentoxide on said substrate only in the region between said electrode.
Claim 15
Dependent Claim
75 words
The method of claim 12 wherein: a. the electric potential applied between said electrodes is in the range of about 40 to about 70 volts; b. the polarity of the electric potential applied to said electrodes is reversed at a rate of about 4 to 15 times a minute; and c. the electric potential is removed from said electrodes when the current between said electrodes reaches a level of about 5 to about 10 milliamps.
Claim 16
Dependent Claim
32 words
The method of claim 13 wherein said electrodes and substrate are contacted with a gas containing molecular oxygen after initiation of the step of contacting said electrodes and substrate with gaseous phosphorus.
Claim 17
Dependent Claim
62 words
An electrolytic cell comprising a substrate, at least two spaced-apart thin ribbon electrodes deposited on the surface of said substrate, and a thin layer of phosphorus pentoxide deposited on said substrate and filling only the space between said electrodes, said phosphorus pentoxide contacting only the edge of said electrodes adjacent to said substrate and having a thickness less than about 0.5 micron.
Claim 18
Dependent Claim
62 words
An electrolytic cell comprising a substrate, at least two spaced-apart thin ribbon electrodes deposited on the surface of said substrate, and a thin layer of phosphorus pentoxide deposited on said substrate and filling only the space between said electrodes, said phosphorus pentoxide contacting only the edge of said electrodes adjacent to said substrate and having a thickness less than about 0.5 micron.
Claim 19
Dependent Claim
44 words
A fuel cell comprising a porous, electrically nonconductive substrate, at least two electrodes in contact with opposite sides of said substrate, electrical circuit means connected to said electrodes, and a thin coating of phosphorus pentoxide on the surface of the pores in said substrate.
Claim 20
Dependent Claim
44 words
A fuel cell comprising a porous, electrically nonconductive substrate, at least two electrodes in contact with opposite sides of said substrate, electrical circuit means connected to said electrodes, and a thin coating of phosphorus pentoxide on the surface of the pores in said substrate.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |