Patent US3491752A successfully refreshed from Google Patents.
US3491752A
Expired / Lapsed
US
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Breathing apparatus
Assignee: Abbott Laboratories
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Filing: 1966-07-05
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Granted: 1970-01-27
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 John James Cowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:45
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/28; A42B3/288; A42B3/0406; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733835A
Cited
GB189313982A
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US771801A
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US882686A
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US932880A
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US1185392A
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US2432627A
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US2380372A
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US2577045A
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US2850011A
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US3018776A
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US3068865A
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US3208449A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |