Patent US2921735A successfully refreshed from Google Patents.
US2921735A
Expired / Lapsed
US
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Rotary depository
Assignee: HERRING HALL MARVIN SAFE COMPA
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Filing: 1958-07-28
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Granted: 1960-01-19
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Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Blauvelt Roland George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:38
CPC Classifications
E; E05; E05G; E05G7/00; E05G7/001; H; H01; H01K; H01K3/00; H01K3/12
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |