Patent US2852424A successfully refreshed from Google Patents.
US2852424A
Expired / Lapsed
US
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Reinforced plastic springs
Assignee: Individual
•
Filing: 1957-04-30
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Granted: 1958-09-16
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Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Frank W Reinhart
- 👤 Murray C Slone
- 👤 Horn Leon
- 👤 Desmond A George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:37
CPC Classifications
B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29B15/125; B29C; B29C53/00; B29C53/02; B29C53/12; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/205; B29C70/28; B29C70/54; B29C70/542; F; F16; F16F; F16F1/00; F16F1/36; F16F1/366; B29L; B29L2031/00; B29L2031/774; B29L2031/7742; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49801; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A METHOD OF FABRICATING PLASTIC SPRINGS COMPRISING THE STEPS OF: IMPREGNATING FILAMENTS OF GLASS ROVINGS WITH A FLUID RESINOUS MATERIAL; INSERTING SAID ROVINGS IN A COILABLE STRUCTURE; COILING SAID STRUCTURE; CURING THE RESINOUS
Claim 2
Independent Claim
33 words
A METHOD OF FABRICATING PLASTIC SPRINGS COMPRISING THE STEPS OF: IMPREGNATING FILAMENTS OF GLASS ROVINGS WITH A FLUID RESINOUS MATERIAL; INSERTING SAID ROVINGS IN A COILABLE STRUCTURE; COILING SAID STRUCTURE; CURING THE RESINOUS
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |