Patent US3429757A successfully refreshed from Google Patents.
US3429757A
Expired / Lapsed
US
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Method of sealing gas transfer devices
Assignee: General Electric Co
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Filing: 1965-08-26
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Granted: 1969-02-25
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Expires: 1985-08-26
Abstract
No abstract record available.
Inventors
- 👤 James L Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/06; B01D63/08; B01D63/081; B01D2319/00; B01D2319/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3246450A
Cited
US3002870A
Cited
US3232026A
Cited
US3196757A
Cited
US3347728A
Cited
US3342729A
Cited
US3372073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |