US3452636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather resistant fastener assembly
Assignee: Construction Fasteners Inc
•
Filing: 1967-06-15
•
Granted: 1969-07-01
•
Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Irvin Cohen
- 👤 Bernard D Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:21
CPC Classifications
F; F16; F16B; F16B43/00; F16B43/001; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2326455A
Cited
US2765834A
Cited
US2917819A
Cited
US3062557A
Cited
GB892870A
Cited
US3160054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |