Patent US4842582A successfully refreshed from Google Patents.
Patent US3222997A successfully refreshed from Google Patents.
US3222997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic control system
Assignee: Individual
•
Filing: 1963-05-27
•
Granted: 1965-12-14
•
Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Leland F Blatt
- 👤 Frank H Wiesenhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:14
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US967245A
Cited
US1023267A
Cited
US2397814A
Cited
US2642847A
Cited
US2753849A
Cited
US2837785A
Cited
US2867192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |