US2488709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring actuated device
Assignee: Individual
•
Filing: 1947-10-23
•
Granted: 1949-11-22
•
Expires: 1967-10-23
Abstract
No abstract record available.
Inventors
- 👤 Roland W Colwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:20
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44; B66C1/48; A; A47; A47G; A47G1/00; A47G1/16; A47G1/20; A47G1/21; A47G25/00; A47G25/14; A47G25/48; A47G25/483; A47G25/485; Y; Y10; Y10T; Y10T24/00; Y10T24/23; Y10T24/44; Y10T24/44291; Y10T24/44368; Y10T24/44376; Y10T24/44385; Y10T24/44462; Y10T24/4447; Y10T24/44487
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) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |