US3531323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus and method
Assignee: Aerospace Tools Inc
•
Filing: 1967-03-15
•
Granted: 1970-09-29
•
Expires: 1987-03-15
Abstract
No abstract record available.
Inventors
- 👤 Richard D Carpenter
- 👤 Jerry L Schad
- 👤 Jess M Delozier
- 👤 John H Brown
- 👤 William G Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:31
CPC Classifications
C; C23; C23G; C23G3/00; C23G5/00; C23G5/02; C23G5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2222516A
Cited
US2348465A
Cited
US2493120A
Cited
US2941908A
Cited
US2912990A
Cited
US3364067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |