US3447947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting film
Assignee: Bexford Ltd
•
Filing: 1965-03-15
•
Granted: 1969-06-03
•
Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Terence A Abbott
- 👤 Margaret L Clachan
- 👤 David Rankine Kennedy
- 👤 Ian S Mcintyre
- 👤 Basil R Shephard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; G03C1/95; C08J2367/00; C08J2367/02; C08J2401/00; C08J2401/02; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2999016A
Cited
US2870044A
Cited
US2964423A
Cited
US3227576A
Cited
US3307966A
Cited
US3309222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |