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US3462183A
Expired / Lapsed
US
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Shockproof doorknob
Assignee: WALTER L MCDANIEL
•
Filing: 1967-06-19
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Granted: 1969-08-19
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Expires: 1987-06-19
Abstract
No abstract record available.
Inventors
- 👤 Robert E Dudley
- 👤 Walter L Mcdaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
E; E05; E05B; E05B1/00; E05B1/0007; Y; Y10; Y10T; Y10T292/00; Y10T292/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3306643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |