US2723447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming pivotal connections for hinged members of sliders or the like
Assignee: PILLING CHAIN Co
•
Filing: 1951-12-01
•
Granted: 1955-11-15
•
Expires: 1971-12-01
Abstract
No abstract record available.
Inventors
- 👤 Birdsall P Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/26; A44B19/28; B; B21; B21D; B21D53/00; B21D53/46; B21D53/50; B21D53/54; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2561; Y10T24/2586; Y10T29/00; Y10T29/49; Y10T29/49782; Y10T29/49783; Y10T29/49826; Y10T29/49833; Y10T29/4984; Y10T29/49845; Y10T29/49849; Y10T29/49863; Y10T29/49876; Y10T29/49945
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |