Patent US2610877A successfully refreshed from Google Patents.
US2610877A
Expired / Lapsed
US
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Attachment for door knobs
Assignee: Individual
•
Filing: 1950-03-31
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Granted: 1952-09-16
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Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Clark H Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:57
CPC Classifications
E; E05; E05B; E05B13/00; E05B13/001; E05B13/005; Y; Y10; Y10S; Y10S16/00; Y10S16/30; Y10S292/00; Y10S292/02; Y10T; Y10T292/00; Y10T292/03; Y10T292/82; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20876
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |