Patent US3506237A successfully refreshed from Google Patents.
US3506237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic rotary valve
Assignee: Chemtrox Corp
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Filing: 1968-08-12
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Granted: 1970-04-14
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Expires: 1988-08-12
Abstract
No abstract record available.
Inventors
- 👤 Andrew M Tometsko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/10; F16K31/105; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074
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) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |