US3021840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable anesthesia apparatus
Assignee: Don Baxter Inc
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Filing: 1957-04-17
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Granted: 1962-02-20
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Hallamore Kim
- 👤 Bernard E Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:42
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/104; A61M16/14; A61M16/18; A61M16/183; A61M11/00; A61M11/06; Y; Y10; Y10S; Y10S261/00; Y10S261/65
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190306312A
Cited
GB107990A
Cited
DE561107C
Cited
US2655286A
Cited
US2705501A
Cited
US2856922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |