Patent DE294986C successfully refreshed from Google Patents.
Patent US3537471A successfully refreshed from Google Patents.
US3537471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curb box and installations thereof
Assignee: ROBERT R HOULE
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Filing: 1968-08-07
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Granted: 1970-11-03
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Expires: 1988-08-07
Abstract
No abstract record available.
Inventors
- 👤 Robert R Houle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:39
CPC Classifications
F; F16; F16L; F16L5/00; E; E03; E03B; E03B9/00; E03B9/02; E03B9/08; E03B9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991; Y10T137/6995; Y10T137/7017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |