Patent US1764688A successfully refreshed from Google Patents.
Patent US3462074A successfully refreshed from Google Patents.
US3462074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressor apparatus and method
Assignee: JOHN E GRIMMER
•
Filing: 1968-02-23
•
Granted: 1969-08-19
•
Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 John E Grimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:51
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B41/00; F04B41/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2084670A
Cited
US2151825A
Cited
US2310520A
Cited
US3193193A
Cited
US3136477A
Cited
US3153508A
Cited
US3244106A
Cited
US3349994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |