US3481152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser head pressure control system
Assignee: Frick Co Inc
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Filing: 1968-01-18
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Granted: 1969-12-02
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Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 William M Seeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/0408; F28F; F28F27/00; F28F27/02
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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |