US2877818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor bolt with spring biased reaming plates
Assignee: Individual
•
Filing: 1956-11-07
•
Granted: 1959-03-17
•
Expires: 1976-11-07
Abstract
No abstract record available.
Inventors
- 👤 Chester F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:09
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F16B13/08; F16B13/0833; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/968; Y10T; Y10T83/00; Y10T83/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1794899A
Cited
US2209495A
Cited
US2707897A
Cited
US2643573A
Cited
US2698552A
Cited
US2729038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |