US2489121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming pipe covering sections
Assignee: Owens Corning
•
Filing: 1944-05-13
•
Granted: 1949-11-22
•
Expires: 1964-05-13
Abstract
No abstract record available.
Inventors
- 👤 Howard W Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:01
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74; D04H1/40; D04H1/58; D04H1/64; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49796
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321517A
Cited
US1587462A
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US1519742A
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US1483452A
Cited
US2350996A
Cited
US2357042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |