US2999681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring bellows for air spring systems
Assignee: Daimler Benz AG
•
Filing: 1957-03-15
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Granted: 1961-09-12
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Muller Josef
- 👤 Friedrich H Van Winsen
- 👤 Alfred G Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:57
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/0445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1177142A
Cited
US1537112A
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GB345548A
Cited
GB400616A
Cited
US2393493A
Cited
US2537637A
Cited
US2773686A
Cited
US2790650A
Cited
US2848956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |