US3435852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible ducting
Assignee: Vulcan Australia Ltd
•
Filing: 1967-05-15
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Granted: 1969-04-01
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 John Massey Trihey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:50
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124; B21C37/15; B21C37/156; B21C37/157; F; F16; F16L; F16L11/00; F16L11/14; F16L11/15; F16L11/16
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |