US2918780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring traveler
Assignee: U S Ring Traveler Co
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Filing: 1956-04-19
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Granted: 1959-12-29
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Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Harold G Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/52; D01H7/60; D01H7/604
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A SELF-LUBRICATING RING TRAVELER FOR SPINING OR TWISTING OPERATIONS WHICH COMPRISES AN INTERNAL REINFORCING MEMBER COVERED WITH A LAYER OF SYNTHETIC POLYMER COMPRISING THE COPOLYMER OF 3,3-BIS(CHLOROMETHYL) OXETANE AND ANOTHER MONOMERIC OXETANE.
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |