Patent US3382650A successfully refreshed from Google Patents.
US3382650A
Expired / Lapsed
US
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Gas filters
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1964-12-24
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Granted: 1968-05-14
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Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Peteri Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/42; B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D39/2068; B01D39/2082; D21H13/40; B01D2239/00; B01D2239/04; B01D2239/0457; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/10; B01D2239/12; B01D2239/1225; B01D2239/1233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2235089A
Cited
US3246767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |