US2447474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for expanding rubber rings
Assignee: Elastrator Co Ltd
•
Filing: 1944-12-22
•
Granted: 1948-08-17
•
Expires: 1964-12-22
Abstract
No abstract record available.
Inventors
- 👤 Hammond Arthur Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:25
CPC Classifications
A; A61; A61D; A61D1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T29/53661
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |