US3248118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge devices fabricating apparatus and method
Assignee: Philips North America LLC
•
Filing: 1961-12-11
•
Granted: 1966-04-26
•
Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Pechy William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/395
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
THE METHOD OF SUPPLEMENTING THE ACTION OF SEALS WHICH PROTECT AGAINST INGRESS OF GASEOUS IMPURITY INTO A VOLUME WHICH CONTAINS A DESIRED SUBSTANCE, WHICH METHOD COMPRISES, MAINTAINING A BARRIER VACUUM BETWEEN ALL OF SAID SEALS WHICH ARE PROXIMATE TO SAID VOLUME TO BE PROTECTED AND ANY PATH THROUGH WHICH GASEOUS IMPURITY MIGHT FIND INGRESS TO THE SAID SEALS WHICH ARE PROXIMATE TO SAID VOLUME TO BE PROTECTED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |