Patent US2754463A successfully refreshed from Google Patents.
US2859399A
Expired / Lapsed
US
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Control system
Assignee: Welding Research Inc
•
Filing: 1955-09-30
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Granted: 1958-11-04
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 Marcel R Sommeria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:30
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/26; H02P7/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2264175A
Cited
DE895022C
Cited
US2431083A
Cited
US2640180A
Cited
US2600519A
Cited
US2508467A
Cited
US2728046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |