US3482777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating valve construction
Assignee: Zyrotron Ind Inc
•
Filing: 1968-02-12
•
Granted: 1969-12-09
•
Expires: 1988-02-12
Abstract
No abstract record available.
Inventors
- 👤 Frederic R Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:29
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/185; G05D23/1858; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365
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) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |