Patent US3372913A successfully refreshed from Google Patents.
US3372913A
Expired / Lapsed
US
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Rotary device for heat treatment of pipes
Assignee: LOKOMOTIVBAU ELEKTROTECH
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Filing: 1965-10-11
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Granted: 1968-03-12
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Gaabs Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:44
CPC Classifications
C; C03; C03B; C03B29/00; C03B29/04; C03B29/06; C21; C21D; C21D9/00; C21D9/08; C21D9/0037
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |