US3411374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic vent control
Assignee: SPRINGTROL Inc
•
Filing: 1967-05-03
•
Granted: 1968-11-19
•
Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Holly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
F; F16; F16C; F16C1/00; F16C1/26; F16C1/262; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/2042; Y10T74/20426; Y10T74/20462; Y10T74/20468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1294854A
Cited
GB978315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |