US3404705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling and valve mechanism
Assignee: Hansen Manufacturing Co Inc
•
Filing: 1965-09-10
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Granted: 1968-10-08
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Expires: 1985-09-10
Abstract
No abstract record available.
Inventors
- 👤 Kent B Zopf
- 👤 Norton James Frederick
- 👤 Howard J Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:38
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/38; F16L37/46; F16L37/22; F16L37/23; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667
Claims Analysis
Total Claims: 0
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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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |