Patent US5853397A successfully refreshed from Google Patents.
Patent US1752631A successfully refreshed from Google Patents.
US1752631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed-valve mounting
Assignee: New York Air Brake LLC
•
Filing: 1929-01-29
•
Granted: 1930-04-01
•
Expires: 1949-01-29
Abstract
No abstract record available.
Inventors
- 👤 Charles A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/04; B60T17/046; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5196
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-03-31 | 1933-09-30 | 1934-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-03-31 | 1937-09-30 | 1938-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-03-31 | 1941-09-30 | 1942-04-01 | $7700.00 | Window Closed / Lapsed |