US2974946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic spring structures
Assignee: Individual
•
Filing: 1957-01-17
•
Granted: 1961-03-14
•
Expires: 1977-01-17
Abstract
No abstract record available.
Inventors
- 👤 Tuczek Franz Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:15
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105805A
Cited
US886617A
Cited
US1002822A
Cited
US2653021A
Cited
US2757376A
Cited
US2812193A
Cited
US2848249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |