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Patent US2720102A successfully refreshed from Google Patents.
US2720102A
Expired / Lapsed
US
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Portable lock
Assignee: Yale and Towne Manufacturing Co
•
Filing: 1952-04-05
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Granted: 1955-10-11
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Expires: 1972-04-05
Abstract
No abstract record available.
Inventors
- 👤 Roy C Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:32
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/18; E05C19/182; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5173; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5327
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |