US3457920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing cross contamination in administering anesthesia and apparatus therefor
Assignee: NORBERT D THOMPSON
•
Filing: 1967-01-05
•
Granted: 1969-07-29
•
Expires: 1987-01-05
Abstract
No abstract record available.
Inventors
- 👤 Norbert D Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:47
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/104; Y; Y10; Y10S; Y10S128/00; Y10S128/909
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1452039A
Cited
US2304033A
Cited
GB767389A
Cited
US2797684A
Cited
FR1211941A
Cited
US3089493A
Cited
US3240567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |