US3424186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating device
Assignee: Individual
•
Filing: 1966-09-26
•
Granted: 1969-01-28
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert J Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:31
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/14; C; C22; C22B; C22B21/00; C22B21/0084; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3109; Y10T137/3115; Y10T137/3127; Y10T137/6416; Y10T137/8593; Y10T137/85954; Y10T137/86187; Y10T137/86212; Y10T137/86228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123015A
Cited
US2400651A
Cited
US3050794A
Cited
US3191247A
Cited
US3058432A
Cited
US3121103A
Cited
US3320970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |