US3496996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for providing large surface area direct contact between a liquid and another fluid
Assignee: Hydro Chemical and Mineral Corp
•
Filing: 1968-07-05
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Granted: 1970-02-24
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Expires: 1988-07-05
Abstract
No abstract record available.
Inventors
- 👤 Asriel Osdor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/32; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/043; F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32279; B01J2219/32286; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S159/00; Y10S159/17; Y10S165/00; Y10S165/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2447746A
Cited
US3151677A
Cited
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 |