Patent US3497940A successfully refreshed from Google Patents.
US3497940A
Expired / Lapsed
US
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Shell and plug assembly machine
Assignee: INDUSTRIAL PLANTS Corp F/K/A DELTA INDUSTRIES Inc A CORP OF CT
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Filing: 1967-01-30
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Granted: 1970-03-03
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Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Warren J Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:22
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/0093; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53313; Y10T29/53365; Y10T29/53383; Y10T29/53391
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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |