Patent US2403079A successfully refreshed from Google Patents.
Patent US3081992A successfully refreshed from Google Patents.
US3081992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic spring
Assignee: Individual
•
Filing: 1961-07-12
•
Granted: 1963-03-19
•
Expires: 1981-07-12
Abstract
No abstract record available.
Inventors
- 👤 Kessler Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
F; F16; F16F; F16F1/00; B; B29; B29C; B29C33/00; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44872
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
HOMOGENEOUS ONE-PIECE PLASTIC UNIT COMPRISING A FLEXIBLE AND EXTENSIBLE PLASTIC COIL SPRING AND INTEGRAL FASTENING MEANS AT AT LEAST ONE END THEREOF, SAID SPRING COMPRISING A COILED FILAMENT OF PLASTIC MATERIAL, SAID FASTENING MEANS COMPRISING AN ENLARGEMENT OF THE SAME PLASTIC MATERIAL AS THE SPRING NEAR AN END OF SAID FILAMENT TO SERVE AS A STOP, A REDUCED PORTION BEYOND SAID ENLARGEMENT, AND INTEGRAL SELF-CONTAINED ENGAGEMENT MEANS ON SAID END OF SAID REDUCED PORTION FOR FASTENING THE UNIT TO ANOTHER OBJECT WITHOUT THE USE OF TOOLS, SAID ENGAGEMENT MEANS BEING A BARBED PORTION PERMITTING EASY INSERTION INTO AN APERTURE OF SUITABLE SIZE TO PREVENT WITHDRAWAL OF THE BARBED PORTION, SAID BARBED PORTION COMPRISING A CENTRAL CORE OF SUBSTANTIAL THICKNESS EXTENDING FROM SAID REDUCED PORTION TO THE END OF THE UNIT, AND AT LEAST ONE THIN SPLINE EXTENDING RADIALLY FROM SAID CORE IN THE FORM OF A BARB ELEMENT WHICH IS VERY FLEXIBLE COMPARED WITH SAID CORE.
Claim 2
Dependent Claim
156 words
HOMOGENEOUS ONE-PIECE PLASTIC UNIT COMPRISING A FLEXIBLE AND EXTENSIBLE PLASTIC COIL SPRING AND INTEGRAL FASTENING MEANS AT AT LEAST ONE END THEREOF, SAID SPRING COMPRISING A COILED FILAMENT OF PLASTIC MATERIAL, SAID FASTENING MEANS COMPRISING AN ENLARGEMENT OF THE SAME PLASTIC MATERIAL AS THE SPRING NEAR AN END OF SAID FILAMENT TO SERVE AS A STOP, A REDUCED PORTION BEYOND SAID ENLARGEMENT, AND INTEGRAL SELF-CONTAINED ENGAGEMENT MEANS ON SAID END OF SAID REDUCED PORTION FOR FASTENING THE UNIT TO ANOTHER OBJECT WITHOUT THE USE OF TOOLS, SAID ENGAGEMENT MEANS BEING A BARBED PORTION PERMITTING EASY INSERTION INTO AN APERTURE OF SUITABLE SIZE TO PREVENT WITHDRAWAL OF THE BARBED PORTION, SAID BARBED PORTION COMPRISING A CENTRAL CORE OF SUBSTANTIAL THICKNESS EXTENDING FROM SAID REDUCED PORTION TO THE END OF THE UNIT, AND AT LEAST ONE THIN SPLINE EXTENDING RADIALLY FROM SAID CORE IN THE FORM OF A BARB ELEMENT WHICH IS VERY FLEXIBLE COMPARED WITH SAID CORE.
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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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |