US3541379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for initiating gaseous plasmas
Assignee: PPG Industries Inc
•
Filing: 1967-09-11
•
Granted: 1970-11-17
•
Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 Calvin B Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/48; Y; Y10; Y10S; Y10S422/00; Y10S422/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3357794A
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US3296410A
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US3264508A
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US3121641A
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GB1049536A
Cited
US3311735A
Cited
US3253113A
Cited
US3316082A
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US3275412A
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US3448333A
Cited
US3324334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |