Patent US954808A successfully refreshed from Google Patents.
Patent US3289447A successfully refreshed from Google Patents.
US3289447A
Expired / Lapsed
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Explosion forming process
Assignee: National Research Development Corp UK
•
Filing: 1963-08-08
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Granted: 1966-12-06
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Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Amini Ehssanollah
- 👤 Coldfield Sutton
- 👤 Tobias Stephen Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:58
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/06; B21D26/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN EXPLOSION-FORMING APPARATUS FOR PERFORMING A FORMING OPERATION ON A WORKPIECE, COMPRISING A PRESSUREPULSE-SHAPING PART, SAID PULSE-SHAPING PART BEING ARRANGED TO FACE UPWARDLY SO AS TO RETAIN LIQUID FOR PULSE TRANSMITTING PURPOSES, A WORKPIECE-RETAINING PART, SAID WORKPIECERETAINING PART BEING ARRANGED FOR SUBSTANTIALLY PRESSURETIGHT CONNECTION TO SAID PULSE-SHAPING PART, AN EXPLOSIVEPOSITIONING MEANS ASSOCIATED WITH SAID PULSE-SHAPING PART,
Claim 2
Dependent Claim
56 words
AN EXPLOSION-FORMING APPARATUS FOR PERFORMING A FORMING OPERATION ON A WORKPIECE, COMPRISING A PRESSUREPULSE-SHAPING PART, SAID PULSE-SHAPING PART BEING ARRANGED TO FACE UPWARDLY SO AS TO RETAIN LIQUID FOR PULSE TRANSMITTING PURPOSES, A WORKPIECE-RETAINING PART, SAID WORKPIECERETAINING PART BEING ARRANGED FOR SUBSTANTIALLY PRESSURETIGHT CONNECTION TO SAID PULSE-SHAPING PART, AN EXPLOSIVEPOSITIONING MEANS ASSOCIATED WITH SAID PULSE-SHAPING PART,
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |