US3457873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping chamber decompression
Assignee: Vickers Inc
•
Filing: 1967-03-20
•
Granted: 1969-07-29
•
Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Howard E Fischer
- 👤 Harold R Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2014; F04B1/2021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2155455A
Cited
US2298850A
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GB684551A
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US3092035A
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US3094078A
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US3199461A
Cited
US3249061A
Cited
US3238888A
Cited
US3362342A
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 |