US2977892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportation systems
Assignee: Alweg Forschung GmbH
•
Filing: 1953-10-05
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Granted: 1961-04-04
•
Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Ihmig Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:15
CPC Classifications
B; B61; B61B; B61B13/00; B61B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US576941A
Cited
US889369A
Cited
US1835133A
Cited
DE522282C
Cited
US2691450A
Cited
US2650731A
Cited
US2853956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |