US3425562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semipermeable membrane cleaning means
Assignee: Trane US Inc
•
Filing: 1966-07-22
•
Granted: 1969-02-04
•
Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Edward A G Hamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:36
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/06; B01D63/062; B01D63/063; B01D65/00; B01D65/08; B01D65/02; B01D65/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2964124A
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US2641364A
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US2664395A
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GB936421A
Cited
US3206397A
Cited
US3332746A
Cited
US3276996A
Cited
US3312349A
Cited
US3352422A
Cited
US3250701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |