US3432905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating heat transfer tubing
Assignee: Halcon Research and Development Corp
•
Filing: 1964-07-06
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Granted: 1969-03-18
•
Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Paul S Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:18
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; B21D53/085; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/49375; Y10T29/49377; Y10T29/49378; Y10T29/4938; Y10T29/4981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281207A
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US2754573A
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US2944338A
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US2841866A
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US2948054A
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US3189087A
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US3131467A
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US3183970A
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US3343250A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |