US2895706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum film support
Assignee: Robertson Photo-Mechanix Inc
•
Filing: 1955-02-14
•
Granted: 1959-07-21
•
Expires: 1975-02-14
Abstract
No abstract record available.
Inventors
- 👤 Delbert T Blatherwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:14
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/42; G03B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1288607A
Cited
US1945481A
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US2317348A
Cited
US2519610A
Cited
US2572640A
Cited
US2717756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |