Patent US3234708A successfully refreshed from Google Patents.
US3234708A
Expired / Lapsed
US
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Seal-off apparatus
Assignee: Arthur D Little Inc
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Filing: 1963-04-12
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Granted: 1966-02-15
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Richard P Berthiaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:19
CPC Classifications
F; F16; F16K; F16K51/00; F16K51/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |