US3373550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and apparatus for alternate-reverse twisting of indefinite lengths of strand material
Assignee: AT&T Inc
•
Filing: 1965-06-10
•
Granted: 1968-03-19
•
Expires: 1985-06-10
Abstract
No abstract record available.
Inventors
- 👤 Symonds John Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:01
CPC Classifications
D; D07; D07B; D07B3/00; D07B3/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2837292A
Cited
DE1032350B
Cited
US2882677A
Cited
US2998694A
Cited
US3090190A
Cited
US2971709A
Cited
DE1084796B
Cited
US3169360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |