US2621947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel knob construction
Assignee: SPENGLER LOOMIS Manufacturing CO
•
Filing: 1948-03-11
•
Granted: 1952-12-16
•
Expires: 1968-03-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Markvart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
G; G05; G05G; G05G1/00; G05G1/08; G05G1/085; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10T; Y10T403/00; Y10T403/49; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20762; Y10T74/20834; Y10T74/2084
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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |