US3549077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for fabricating thin-walled steel cylinders
Assignee: Ameron Inc
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Filing: 1968-12-23
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Granted: 1970-12-22
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Expires: 1988-12-23
Abstract
No abstract record available.
Inventors
- 👤 George E Huck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:48
CPC Classifications
B; B21; B21D; B21D49/00; B21D51/00; B21D51/16; B21D51/24; B23; B23K; B23K9/00; B23K9/02; B23K9/032; B23K9/0325; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |