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Patent US2568040A successfully refreshed from Google Patents.
US2568040A
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Machine for forming conoidal surfaces
Assignee: Compagnie de Saint Gobain SA
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Filing: 1946-12-10
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Granted: 1951-09-18
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Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
- 👤 Robert G R Touvay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:53
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/02; C03B33/04; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q1/4804; B23Q27/00; B23Q27/003; B24; B24B; B24B13/00; B24B13/04; B24B13/046; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US637476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |