Patent FR994491A successfully refreshed from Google Patents.
US3448232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave unit seal
Assignee: Hammtronics Systems Inc
•
Filing: 1967-01-11
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Granted: 1969-06-03
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Expires: 1987-01-11
Abstract
No abstract record available.
Inventors
- 👤 James H Kluck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:07
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76; H05B6/763
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2956143A
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US2958754A
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US3196242A
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US3182164A
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US3219747A
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US3260832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |