US3367505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semipermeable membrane backing and support medium
Assignee: Gulf General Atomic Inc
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Filing: 1965-05-25
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Granted: 1968-02-06
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Donald T Bray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/10; B01D69/105; E; E02; E02B; E02B15/00; E02B15/04; E02B15/045; B01D2313/00; B01D2313/14; B01D2313/146; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131
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) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |