Patent US3511243A successfully refreshed from Google Patents.
US3511243A
Expired / Lapsed
US
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Apparatus for providing a breathing conduit communicating with the trachea at the base of the neck
Assignee: FREDERIC J TOY
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Filing: 1967-07-18
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Granted: 1970-05-12
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Expires: 1987-07-18
Abstract
No abstract record available.
Inventors
- 👤 Frederic J Toy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0465; A61M16/0472; A61M16/08; A61M16/0816; A61M16/0825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US460987A
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GB190603895A
Cited
GB125754A
Cited
US2024982A
Cited
GB649230A
Cited
US2751911A
Cited
US2991787A
Cited
US2856934A
Cited
US3132645A
Cited
US3137298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |