US2927453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triple electrical seal vault
Assignee: Individual
•
Filing: 1958-03-05
•
Granted: 1960-03-08
•
Expires: 1978-03-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Patterson
- 👤 Walter A Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:42
CPC Classifications
E; E04; E04H; E04H13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1818485A
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US900218A
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US1056955A
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US1420709A
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US1560106A
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US2004454A
Cited
US2036816A
Cited
US2018941A
Cited
US2173622A
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US2115292A
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US2265876A
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US2378801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |