Patent US6031864A successfully refreshed from Google Patents.
Patent US3335453A successfully refreshed from Google Patents.
US3335453A
Expired / Lapsed
US
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Safety device for doors
Assignee: Individual
•
Filing: 1965-06-15
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Granted: 1967-08-15
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Willis B Lovelace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:20
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/02; E05F5/04; E05F2005/046; E05F5/003; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997; Y10T292/1014; Y10T292/1022; Y10T292/1031
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |