US2490252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making precision-bore tubes and other products of glass or the like
Assignee: Fischer and Porter Co
•
Filing: 1944-02-05
•
Granted: 1949-12-06
•
Expires: 1964-02-05
Abstract
No abstract record available.
Inventors
- 👤 Brewer Nathaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:07
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/07; C03B23/073; C03B23/076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786259A
Cited
US911373A
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US790265A
Cited
US1301714A
Cited
US1446026A
Cited
US2254306A
Cited
US2286401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |