Patent US3171397A successfully refreshed from Google Patents.
US3171397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bows
Assignee: Individual
•
Filing: 1961-10-17
•
Granted: 1965-03-02
•
Expires: 1981-10-17
Abstract
No abstract record available.
Inventors
- 👤 John W Daly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:35
CPC Classifications
F; F41; F41B; F41B5/00; F41B5/0005; Y; Y10; Y10S; Y10S273/00; Y10S273/03; Y10S273/06; Y10S273/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A BOW HAVING A RIGID MID-SECTION AND TWO RESILIENT LIMBS ATTACHED TO EITHER END OF THE MID-SECTION, AND A STRING CONNECTING THE EXTREME ENDS OF THE LIMBS, THE IMPROVEMENT COMPRISING: SAID LIMBS BEING CONSTRUCTED TO BE A PORTION OF A SPIRAL WHEN THE BOW IS IN THE UNSTRUNG CONDITION, SAID SPIRAL FOLLOWING THE GENERAL FORMULA OF R0=A, WHEREIN A IS A CONSTANT, R IS THE LENGTH OF A RAY FROM A CENTER POINT TO A POINT ON THE SPIRAL, AND 0 IS THE ANGLE BETWEEN SAID RAY AND A FIXED LINE THROUGH THE CENTER POINT.
Claim 2
Dependent Claim
96 words
IN A BOW HAVING A RIGID MID-SECTION AND TWO RESILIENT LIMBS ATTACHED TO EITHER END OF THE MID-SECTION, AND A STRING CONNECTING THE EXTREME ENDS OF THE LIMBS, THE IMPROVEMENT COMPRISING: SAID LIMBS BEING CONSTRUCTED TO BE A PORTION OF A SPIRAL WHEN THE BOW IS IN THE UNSTRUNG CONDITION, SAID SPIRAL FOLLOWING THE GENERAL FORMULA OF R0=A, WHEREIN A IS A CONSTANT, R IS THE LENGTH OF A RAY FROM A CENTER POINT TO A POINT ON THE SPIRAL, AND 0 IS THE ANGLE BETWEEN SAID RAY AND A FIXED LINE THROUGH THE CENTER POINT.
References Cited (Backward Citations)
US218079A
Cited
US2423765A
Cited
US2507271A
Cited
US2665678A
Cited
US2945488A
Cited
US2995130A
Cited
US2975780A
Cited
US2998811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |