Patent US4320756A successfully refreshed from Google Patents.
US4320756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fresh-air breathing device and method
Assignee: Individual
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Filing: 1981-02-25
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Granted: 1982-03-23
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Expires: 2001-02-25
Abstract
Abstract The recent rash of fires in high-rise hotels and deaths occasioned thereby has given rise to the need for a breathing device and method for supplying a hotel guest and/or fireman with fresh air until he can be rescued. The device and method of this invention provide for the insertion of a breathing tube through the water trap of a toilet to expose an open end thereof to fresh air from a vent pipe connected to a sewer line of the toilet, to enable the user to breathe fresh air through the tube.
Inventors
- 👤 William O. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:19
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
A method for breathing fresh air in a room filled with toxic smoke comprising the steps of inserting a breathing tube through a water trap of a toilet to expose an open end thereof to fresh air from a vent pipe connected to a sewer line of said toilet, and breathing said fresh air through said breathing tube.
Claim 2
Independent Claim
58 words
A method for breathing fresh air in a room filled with toxic smoke comprising the steps of inserting a breathing tube through a water trap of a toilet to expose an open end thereof to fresh air from a vent pipe connected to a sewer line of said toilet, and breathing said fresh air through said breathing tube.
Claim 3
Dependent Claim
18 words
The method of claim 1 further comprising the step of flushing said toilet prior to said inserting step.
Claim 4
Dependent Claim
28 words
The method of claim 1 further comprising the step of blowing any water out of said tube subsequent to said inserting step and prior to said breathing step.
Claim 5
Dependent Claim
18 words
The method of claim 1 further comprising the step of filtering the fresh air breathed through said tube.
References Cited (Backward Citations)
US276699A
Cited
US409428A
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US1007644A
Cited
US1423923A
Cited
US2577606A
Cited
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Cited
FR1473382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-22 | 1985-09-21 | 1986-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-22 | 1989-09-21 | 1990-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-22 | 1993-09-21 | 1994-03-23 | $7700.00 | Window Closed / Lapsed |