US3450236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition material for railway vehicle brake shoes and a method of fabrication of brake shoes
Assignee: Individual
•
Filing: 1967-07-05
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Granted: 1969-06-17
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Expires: 1987-07-05
Abstract
No abstract record available.
Inventors
- 👤 Stefan Nadasan
- 👤 Paul Sulea
- 👤 Dumitru Popescu
- 👤 Carol Schaumburger
- 👤 Coloman Bakonyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:34
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |