US3605399A
Expired / Lapsed
US
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Strings
Assignee: Individual
•
Filing: 1968-03-29
•
Granted: 1971-09-20
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Expires: 1988-03-29
Abstract
Abstract Strings for games racquets are provided which comprise a core consisting of one or more monofilaments of synthetic long chain polymeric material and one or more helical wrappings of a synthetic long chain polymeric material, and in which a lubricant is contained in the core or between the wrapping and the core.
Inventors
- 👤 Jacob Van Rijswijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:38
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/02; A; A01; A01K; A01K91/00; A63; A63B; A63B51/00; A63B51/02; D07B1/14; D07B1/141; D07B1/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |