Patent US3228394A successfully refreshed from Google Patents.
US3228394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gill-type underwater breathing equipment and methods for reoxygenating exhaled breath
Assignee: Individual
•
Filing: 1962-11-30
•
Granted: 1966-01-11
•
Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Waldemar A Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:10
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/184; Y; Y10; Y10S; Y10S159/00; Y10S159/27; Y10S55/00; Y10S55/35
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A METHOD OF REOXYGENATING THE EXHALED BREATH OF A PERSON, WHEREIN A SUBSTANTIALLY LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANCE IS UTILIZED, COMPRISING THE STEPS OF MOVING THE EXHALED BREATH TO AND IN CONTACT WITH ONE SIDE OF THE LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANE, DISPOSING THE OTHER SIDE OF THE LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANE IN CONTACT WITH WATER CONTAINING DISSOLVED OXYGEN TO EXTRACT DISSOLVED OXYGEN FROM SAID WATER THROUGH THE MEMBRANE, AND ADDING SAID DISSOLVED OXYGEN TO SAID EXHAUST BREATH WHILE EXCLUDING WATER, AND MOVING SAID REOXYGENATED BREATH TO THE PERSON FOR REBREATHING.
Claim 2
Independent Claim
86 words
A METHOD OF REOXYGENATING THE EXHALED BREATH OF A PERSON, WHEREIN A SUBSTANTIALLY LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANCE IS UTILIZED, COMPRISING THE STEPS OF MOVING THE EXHALED BREATH TO AND IN CONTACT WITH ONE SIDE OF THE LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANE, DISPOSING THE OTHER SIDE OF THE LIQUID-IMPREVIOUS OXYGEN-PERMEABLE MEMBRANE IN CONTACT WITH WATER CONTAINING DISSOLVED OXYGEN TO EXTRACT DISSOLVED OXYGEN FROM SAID WATER THROUGH THE MEMBRANE, AND ADDING SAID DISSOLVED OXYGEN TO SAID EXHAUST BREATH WHILE EXCLUDING WATER, AND MOVING SAID REOXYGENATED BREATH TO THE PERSON FOR REBREATHING.
Claim 3
Dependent Claim
81 words
GILL-TYPE RESPIRATOR EQUIPMENT FOR UNDERWATER BREATHING INCLUDING CONDUIT MEANS ADAPTED TO CONDUCT THE EXHALED BREATH AWAY FROM A PERSON''S FACE, A FACE PIECE IN COMMUNICATION WITH SAID CONDUIT MEANS, A GAS EXCHANGE UNIT CONNECTED TO THE CONDUIT MEANS AND ADAPTED TO EXTRACT DISSOLVED OXYGEN FROM THE SURROUNDING WATER AND MIX SAID EXTRACTED OXYGEN WITH THE EXHALED BREATTH, AND GAS RETURN MEANS CONNECTED TO SAID GAS EXCHANGE UNIT AND ADAPTED TO CONDUCT THE REOXYGENATED BREATH BACK TO THE PERSON''S FACE FOR REBREATHING.
Claim 4
Dependent Claim
81 words
GILL-TYPE RESPIRATOR EQUIPMENT FOR UNDERWATER BREATHING INCLUDING CONDUIT MEANS ADAPTED TO CONDUCT THE EXHALED BREATH AWAY FROM A PERSON''S FACE, A FACE PIECE IN COMMUNICATION WITH SAID CONDUIT MEANS, A GAS EXCHANGE UNIT CONNECTED TO THE CONDUIT MEANS AND ADAPTED TO EXTRACT DISSOLVED OXYGEN FROM THE SURROUNDING WATER AND MIX SAID EXTRACTED OXYGEN WITH THE EXHALED BREATTH, AND GAS RETURN MEANS CONNECTED TO SAID GAS EXCHANGE UNIT AND ADAPTED TO CONDUCT THE REOXYGENATED BREATH BACK TO THE PERSON''S FACE FOR REBREATHING.
References Cited (Backward Citations)
US908690A
Cited
US1946126A
Cited
US2232901A
Cited
US2388674A
Cited
US2483116A
Cited
US2488261A
Cited
US2686154A
Cited
US2782429A
Cited
US3046180A
Cited
US3025207A
Cited
US2864101A
Cited
US3039393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |