US3473665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control means for water treating apparatus
Assignee: Union Tank Car Co
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Filing: 1968-07-31
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Granted: 1969-10-21
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Expires: 1988-07-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:40
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/06; B01D21/08; B01D21/24; B01D21/30; B01D21/34; F; F28; F28F; F28F25/00; F28F2025/005; F28F25/02
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) | 1972-10-20 | 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 |