Patent US2966438A successfully refreshed from Google Patents.
US2966438A
Expired / Lapsed
US
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Method of forming a grain door
Assignee: International Paper Co
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Filing: 1957-07-01
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Granted: 1960-12-27
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Barton H Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:49
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/001; B61D19/002; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T156/1095; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A PROCESS FOR CONTINUOUSLY FORMING A GRAIN DOOR, THE STEPS OF PASSING BETWEEN FORMING ROLLERS A CORRUGATED MEDIUM ENCLOSED BETWEEN FRANGIBLE LINER SHEETS WHILE SIMULTANEOUSLY PASSING FLAT METAL STRAPS IN SPACED RELATION BETWEEN ONE OF SAID LINER SHEETS AND SAID CORRUGATED MEDIUM AND TRANSVERSE TO THE FLUTES OF SAID MEDIUM.
Claim 2
Dependent Claim
51 words
IN A PROCESS FOR CONTINUOUSLY FORMING A GRAIN DOOR, THE STEPS OF PASSING BETWEEN FORMING ROLLERS A CORRUGATED MEDIUM ENCLOSED BETWEEN FRANGIBLE LINER SHEETS WHILE SIMULTANEOUSLY PASSING FLAT METAL STRAPS IN SPACED RELATION BETWEEN ONE OF SAID LINER SHEETS AND SAID CORRUGATED MEDIUM AND TRANSVERSE TO THE FLUTES OF SAID MEDIUM.
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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |