US2950575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Raceway network
Assignee: Individual
•
Filing: 1958-01-13
•
Granted: 1960-08-30
•
Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hellwig August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:41
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/39; E04C1/397
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306246A
Cited
US659453A
Cited
US1836408A
Cited
US1976946A
Cited
FR970397A
Cited
US2745276A
Cited
GB684982A
Cited
US2850110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |