US2487869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge connection for elastic sheets
Assignee: LEWIS E HAMEL CO Inc
•
Filing: 1947-07-03
•
Granted: 1949-11-15
•
Expires: 1967-07-03
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Hamel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
E; E05; E05D; E05D7/00; E05D7/10; E05D7/1061; E05D7/1077
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) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |