US3522648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed hole and method of producing
Assignee: Caterpillar Inc
•
Filing: 1968-11-29
•
Granted: 1970-08-04
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 William B Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; F; F02; F02B; F02B77/00; F02B77/005; F02M; F02M59/00; F02M59/44; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |