US3468348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inflating elastomeric chambers with nitrogen gas
Assignee: Individual
•
Filing: 1967-01-09
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Granted: 1969-09-23
•
Expires: 1987-01-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Sperberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:57
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; B; B60; B60C; B60C5/00; B60C5/001; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/03; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2221/00; F17C2221/01; F17C2221/014; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/035; F17C2223/036; F17C2270/00; F17C2270/07; F17C2270/0772; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0396
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3364958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |