US3370915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing an inert atmosphere within an elastomeric air chamber
Assignee: Individual
•
Filing: 1966-12-16
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Granted: 1968-02-27
•
Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Sperberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/708; A23B2/712; A23B2/717; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B60; B60C; B60C5/00; B60C5/001; C; C01; C01B; C01B21/00; C01B21/02; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |