US2722131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed sheave structure
Assignee: American Type Founders Co Inc
•
Filing: 1950-10-19
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Granted: 1955-11-01
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Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Robert H Chankalian
- 👤 Willard M Pollock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:09
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; F16H2009/166
Claims Analysis
Total Claims: 0
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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) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |