US3497185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerating and cooling apparatus
Assignee: Sydnor Hydrodynamics Inc
•
Filing: 1968-11-20
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Granted: 1970-02-24
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Expires: 1988-11-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Dively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; F; F28; F28C; F28C3/00; F28C3/06; H02K9/00; H02K9/19; B01F27/00; B01F27/25; B01F27/80; B01F33/00; B01F33/50; B01F33/503; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |