US3516693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe couplings
Assignee: Hepworth Iron Co Ltd
•
Filing: 1968-04-08
•
Granted: 1970-06-23
•
Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 John Benjamin Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; F16L47/10; F16L21/00; F16L21/002; F16L21/005; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |