Patent US2972899A successfully refreshed from Google Patents.
US2972899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical power converter of variable transmission ratio
Assignee: Individual
•
Filing: 1956-04-27
•
Granted: 1961-02-28
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Wiggermann Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:04
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/006; F16H3/02; F16H3/16; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H2200/00; F16H2200/003; F16H2200/0052; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084; Y10T74/19219; Y10T74/19223; Y10T74/19233; Y10T74/19377; Y10T74/19386; Y10T74/19405
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |