US2851113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a variable pitch propeller and its driving turbines
Assignee: Motors Liquidation Co
•
Filing: 1950-11-08
•
Granted: 1958-09-09
•
Expires: 1970-11-08
Abstract
No abstract record available.
Inventors
- 👤 Edmund M Irwin
- 👤 Floyd J Boyer
- 👤 Arthur W Gaubatz
- 👤 Robert J Wente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:36
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB366773A
Cited
US2175179A
Cited
US2094383A
Cited
US2105625A
Cited
US2217364A
Cited
US2396745A
Cited
US2391629A
Cited
US2380889A
Cited
US2415110A
Cited
US2476218A
Cited
US2452298A
Cited
US2531761A
Cited
US2500811A
Cited
US2555784A
Cited
US2649161A
Cited
US2664959A
Cited
US2612225A
Cited
US2645293A
Cited
US2564107A
Cited
GB625176A
Cited
US2545703A
Cited
US2595345A
Cited
US2667935A
Cited
US2589788A
Cited
US2503289A
Cited
US2640550A
Cited
US2557679A
Cited
US2547660A
Cited
US2652122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |