US2602469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced concrete pipe
Assignee: American Pipe and Construction Co
•
Filing: 1946-11-04
•
Granted: 1952-07-08
•
Expires: 1966-11-04
Abstract
No abstract record available.
Inventors
- 👤 William A Whiting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0027; B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/30; B28B21/56; B28B21/60; F16L9/00; F16L9/08; Y; Y10; Y10S; Y10S425/00; Y10S425/218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2044178A
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US2224419A
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US2236108A
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US2296560A
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US2348477A
Cited
US2470009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |