US3513610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete structural member,framework structure,and casting method
Assignee: TRENT CONCRETE STRUCTURES Ltd A CORP OF ENGLAND
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Filing: 1967-02-08
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Granted: 1970-05-26
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Expires: 1987-02-08
Abstract
No abstract record available.
Inventors
- 👤 Derek K Devonport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:34
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/20; E04B1/21; E04B1/215; B; B28; B28B; B28B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB118058A
Cited
US1796048A
Cited
US1086866A
Cited
US1205465A
Cited
US2115949A
Cited
US2208814A
Cited
GB847298A
Cited
US2994415A
Cited
US3261135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |