US3330147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Center tap duct crimper
Assignee: Individual
•
Filing: 1964-07-02
•
Granted: 1967-07-11
•
Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Albert W Wieters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:55
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/02; B21D39/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A TOOL FOR BENDING FLANGES OF DUCTS INCLUDING: (A) AN ELONGATED BIFURCATED SUPPORT MEMBER WITH SPACED APART LEGS HAVING: (1) AN ANVIL MEMBER PIVOTALLY MOUNTED ON ONE END OF ONE OF THE LEGS FOR SHIFTING INTO AND OUT OF THE AREA DEFINED BETWEEN THE LEGS; (2) A FORMING ELEMENT PIVOTALLY MOUNTED ON THE END OF THE OTHER LEG TO SWING INTO AND OUT OF PRESSING REGISTRATION WITH SAID ANVIL FOR FORMING MATERIALS THEREBETWEEN;
Claim 2
Dependent Claim
73 words
A TOOL FOR BENDING FLANGES OF DUCTS INCLUDING: (A) AN ELONGATED BIFURCATED SUPPORT MEMBER WITH SPACED APART LEGS HAVING: (1) AN ANVIL MEMBER PIVOTALLY MOUNTED ON ONE END OF ONE OF THE LEGS FOR SHIFTING INTO AND OUT OF THE AREA DEFINED BETWEEN THE LEGS; (2) A FORMING ELEMENT PIVOTALLY MOUNTED ON THE END OF THE OTHER LEG TO SWING INTO AND OUT OF PRESSING REGISTRATION WITH SAID ANVIL FOR FORMING MATERIALS THEREBETWEEN;
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |