Patent US3473790A successfully refreshed from Google Patents.
US3473790A
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Aeration apparatus
Assignee: Aqseptence Group GmbH
•
Filing: 1967-11-16
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Granted: 1969-10-21
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert Auler
- 👤 Josef Muskat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:21
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/71
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1764498A
Cited
US2787447A
Cited
FR1205301A
Cited
US3208734A
Cited
US3323782A
Cited
US3341450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |