US3173644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety prop
Assignee: —
•
Filing: —
•
Granted: 1965-03-16
•
Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A SAFETY PROP COMPRISING AN EXTENSIBLE AND CONTRACTIBLE POST INCLUDING TELESCOPICALLY ADJUSTABLE DIRECTLY ENGAGED MALE AND FEMALE SECTIONS, MEANS FOR YIELDINGLY RESISTING RELATIVE INWARD SLIDING MOVEMENT OF SAID SECTIONS, SAID MEANS INCLUDING A PIN MOUNTED TRANSVERSELY IN ONE OF THE SECTIONS, A HEADED ROD SLIDABLE LONGITUDINALLY ON THE OTHER SECTION AND ENGAGEABLE WITH THE PIN, AND A COIL SPRING ON THE ROD ENGAGED BETWEEN THE HEAD THEREOF AND THE INNER END OF SAID OTHER SECTION TO BE COMPRESSED THEREBY.
Claim 2
Dependent Claim
79 words
A SAFETY PROP COMPRISING AN EXTENSIBLE AND CONTRACTIBLE POST INCLUDING TELESCOPICALLY ADJUSTABLE DIRECTLY ENGAGED MALE AND FEMALE SECTIONS, MEANS FOR YIELDINGLY RESISTING RELATIVE INWARD SLIDING MOVEMENT OF SAID SECTIONS, SAID MEANS INCLUDING A PIN MOUNTED TRANSVERSELY IN ONE OF THE SECTIONS, A HEADED ROD SLIDABLE LONGITUDINALLY ON THE OTHER SECTION AND ENGAGEABLE WITH THE PIN, AND A COIL SPRING ON THE ROD ENGAGED BETWEEN THE HEAD THEREOF AND THE INNER END OF SAID OTHER SECTION TO BE COMPRESSED THEREBY.
References Cited (Backward Citations)
US418378A
Cited
US1809401A
Cited
US1768206A
Cited
US2583945A
Cited
GB796701A
Cited
US2820626A
Cited
US2937842A
Cited
US2979304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |