US3509807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus
Assignee: National Research Development Corp UK
•
Filing: 1967-05-15
•
Granted: 1970-05-05
•
Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Dennis A Sutton
- 👤 John H Jeffree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:14
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50; G03B27/00; G03B27/32; G03B27/323; G03D; G03D13/00; G03D13/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3023686A
Cited
US3148612A
Cited
US3183768A
Cited
US3194112A
Cited
US3301157A
Cited
US3372617A
Cited
US3382764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |