US1653381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for forming constructions in exhaust tubes
Assignee: Westinghouse Lamp Co
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Filing: 1921-02-05
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Granted: 1927-12-20
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Expires: 1941-02-05
Abstract
No abstract record available.
Inventors
- 👤 Whitmore James Bryant
- 👤 Ferguson John Ebling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/047; C03B23/0473
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) | 1930-12-19 | 1931-06-20 | 1931-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-12-19 | 1935-06-20 | 1935-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-12-19 | 1939-06-20 | 1939-12-20 | $7700.00 | Window Closed / Lapsed |