Patent US3535873A successfully refreshed from Google Patents.
US3535873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine cooling devices
Assignee: Individual
•
Filing: 1968-10-23
•
Granted: 1970-10-27
•
Expires: 1988-10-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph Szydlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:05
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2442019A
Cited
US2648519A
Cited
US2922278A
Cited
GB776847A
Cited
US2919891A
Cited
US3034298A
Cited
US3437313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |