US215037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in spring-clasps
Assignee: —
•
Filing: —
•
Granted: 1879-05-06
•
Expires: 1896-05-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:44
CPC Classifications
A; A47; A47C; A47C21/00; A47C21/02; A47C21/022; F; F16; F16B; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16B2/241; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3459; Y10T24/44; Y10T24/44017; Y10T24/44641; Y10T24/44769; Y10T24/44923
Claims Analysis
Total Claims: 0
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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) | 1882-05-05 | 1882-11-04 | 1883-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-05-05 | 1886-11-04 | 1887-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-05-05 | 1890-11-04 | 1891-05-06 | $7700.00 | Window Closed / Lapsed |