US3138382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blank twistable to form a blowgun dart
Assignee: COMET CORP
•
Filing: 1961-04-07
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Granted: 1964-06-23
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Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Melvin R Barker
- 👤 Bill H Dellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:17
CPC Classifications
F; F42; F42B; F42B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AS AN ARTICLE OF MANUFACTURE, A THIN, FLEXIBLE, SUBSTANTIALLY INELASTIC SHEET OF MATERIAL ADAPTED FOR TWISTING MANIPULATION TO FORM A TAPERING HOLLOW DART AND HAVING SUBSTANTIALLY PARALLEL SIDES OF UNEQUAL LENGTH, THE LONGER OF SAID SIDES EXTENDING A RELATIVELY SHORT DISTANCE ABOVE AND A GREATER DISTANCE BELOW THE SHORTER SIDE, A CONVEXLY CURVING EDGE EXTENDING BETWEEN THE TOP OF THE SIDES, AND THE LOWER PORTION OF AT LEAST ONE OF SAID SIDES EXTENDING DOWNWARDLY TO FORM A GENERALLY TRUNCATED, SUBSTANTIALLY TRIANGULAR BOTTOM PORTION OF THE SHEET, WHEREBY THE LARGER END OF THE DART WILL LIE IN A PLANE SUBSTANTIALLY PERPENDICULAR TO ITS LENGTHWISE AXIS WHEN THE TWISTING MANIPULATION IS COMPLETED.
Claim 2
Dependent Claim
110 words
AS AN ARTICLE OF MANUFACTURE, A THIN, FLEXIBLE, SUBSTANTIALLY INELASTIC SHEET OF MATERIAL ADAPTED FOR TWISTING MANIPULATION TO FORM A TAPERING HOLLOW DART AND HAVING SUBSTANTIALLY PARALLEL SIDES OF UNEQUAL LENGTH, THE LONGER OF SAID SIDES EXTENDING A RELATIVELY SHORT DISTANCE ABOVE AND A GREATER DISTANCE BELOW THE SHORTER SIDE, A CONVEXLY CURVING EDGE EXTENDING BETWEEN THE TOP OF THE SIDES, AND THE LOWER PORTION OF AT LEAST ONE OF SAID SIDES EXTENDING DOWNWARDLY TO FORM A GENERALLY TRUNCATED, SUBSTANTIALLY TRIANGULAR BOTTOM PORTION OF THE SHEET, WHEREBY THE LARGER END OF THE DART WILL LIE IN A PLANE SUBSTANTIALLY PERPENDICULAR TO ITS LENGTHWISE AXIS WHEN THE TWISTING MANIPULATION IS COMPLETED.
References Cited (Backward Citations)
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US1346639A
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US1576515A
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US2011749A
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US2504757A
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US2821397A
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US2891794A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |