US2621902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calandria casing with telescopic sections
Assignee: Goslin-Birmingham Manuf Co
•
Filing: 1949-03-12
•
Granted: 1952-12-16
•
Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Lindquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:21
CPC Classifications
F; F28; F28F; F28F9/00; B; B01; B01D; B01D1/00; B01D1/06; B01D1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US240220A
Cited
US1787086A
Cited
US1832637A
Cited
US2003815A
Cited
US2102723A
Cited
US2363526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |