Patent US2899667A successfully refreshed from Google Patents.
US2899667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
bredtschneider etal
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:02
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1657670A
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US2290031A
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US2441284A
Cited
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Cited
US2541764A
Cited
US2640860A
Cited
US2677710A
Cited
US2686825A
Cited
US2758145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |