US3137268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning device
Assignee: Individual
•
Filing: 1962-05-23
•
Granted: 1964-06-16
•
Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Carl G Hornwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:57
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A WARNING DEVICE COMPRISING IN COMBINATION AT LEAST ONE WASHER AND A FRANGIBLE WAFER DISPOSED THEREAGAINST, SAID WAFER CONTAINING AN INDICATING MEDIUM ADAPTED TO EXUDE THEREFROM SUBSEQUENT TO FRACTURE OF SAID WAFER, SAID WASHER AND SAID WAFER BEING RECEIVABLE UPON THE SHANK OF A BOLT AND ADAPTED FOR POSITIONING BETWEEN THE HEAD OF THE BOLT AND THE MEMBER THROUGH WHICH THE BOLT IS EXTENDED.
Claim 2
Dependent Claim
64 words
A WARNING DEVICE COMPRISING IN COMBINATION AT LEAST ONE WASHER AND A FRANGIBLE WAFER DISPOSED THEREAGAINST, SAID WAFER CONTAINING AN INDICATING MEDIUM ADAPTED TO EXUDE THEREFROM SUBSEQUENT TO FRACTURE OF SAID WAFER, SAID WASHER AND SAID WAFER BEING RECEIVABLE UPON THE SHANK OF A BOLT AND ADAPTED FOR POSITIONING BETWEEN THE HEAD OF THE BOLT AND THE MEMBER THROUGH WHICH THE BOLT IS EXTENDED.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |