US3497423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact multiple effect still having stacked impervious and pervious membranes
Assignee: Pactide Corp
•
Filing: 1966-05-26
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Granted: 1970-02-24
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Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 Franklin A Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; B01D61/3621; B01D1/00; B01D1/06; B01D1/10; B01D1/22; B01D1/26; B01D3/00; B01D3/02; B01D53/00; B01D53/22; B01D63/00; B01D63/08; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/14; C02F1/16; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131; Y02A20/138; Y02A20/142; Y02A20/20; Y02A20/208; Y02A20/211; Y02A20/212; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S159/00; Y10S159/27; Y10S159/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2386826A
Cited
US2758083A
Cited
US3240683A
Cited
US3060119A
Cited
US3129146A
Cited
US3340186A
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 |