Patent US3560143A successfully refreshed from Google Patents.
US3560143A
Expired / Lapsed
US
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Method of providing an inert atmosphere within an elastomeric air chamber
Assignee: Individual
•
Filing: 1967-10-18
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Granted: 1971-02-02
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Expires: 1987-10-18
Abstract
Abstract REMOVAL OF OXYGEN FROM AIR IN ELASTOMERIC CHAMBERS COMPRISING ADDING TO THE AIR CHAMBER OF THE ELASTOMERIC CHAMBER AN AGENT CONSISTING ESSENTIALLY OF HYDRAZINE AND AN INERT DILUENT.
Inventors
- 👤 Lawrence R Sperberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B60; B60C; B60C5/00; B60C5/001; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |