US2976884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structures
Assignee: Anemostat Corp of America
•
Filing: 1958-05-19
•
Granted: 1961-03-28
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Franz J Kurth
- 👤 Leonard R Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:13
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; F16; F16K; F16K1/00; F16K1/16; F16K1/165; F16K31/00; F16K31/12; F16K31/16; F16K31/163; F16K31/1635; F24F11/00; F24F11/70; F24F11/72; F24F11/74; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/87467; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1132570A
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US2796082A
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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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |