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US3485520A
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Self-locking connection between rigid members and method of making same
Assignee: ALEXANDER CHAD
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Filing: 1968-05-01
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Granted: 1969-12-23
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Expires: 1988-05-01
Abstract
No abstract record available.
Inventors
- 👤 Rayburn G Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:12
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/44; B23G1/46; F; F16; F16B; F16B11/00; F16B11/006; F16B11/008; F16D; F16D1/00; F16D1/02; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17957
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |