US3058460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for supplying and exhausting or exchanging a controlled volume of gas
Assignee: Stephenson Corp
•
Filing: 1957-01-08
•
Granted: 1962-10-16
•
Expires: 1977-01-08
Abstract
No abstract record available.
Inventors
- 👤 Goodner Monroe Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0003; A61M16/0009; A61M16/0057; A61M16/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2629227A
Cited
US2737176A
Cited
GB723178A
Cited
US2766753A
Cited
US2770232A
Cited
US2880719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |