Patent US3330580A successfully refreshed from Google Patents.
US3330580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting device
Assignee: Individual
•
Filing: 1966-07-11
•
Granted: 1967-07-11
•
Expires: 1986-07-11
Abstract
No abstract record available.
Inventors
- 👤 Donald F Vanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04; B43L13/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A DEVICE FOR USE WITH A DRAWING BOARD WHICH COMPRISES A FLEXIBLE SUPPORT SHEET, A HEADER PARALLEL TO THE TOP EDGE OF THE BOARD AND EXTENDING ACROSS THE SUPPORT SHEET AND FASTENED THERETO, A BASE SHEET WITH SUBSTANIALLY PARALLEL EDGES WHICH IS ADAPTED TO BE MOUNTED ON THE DRAWING BOARD AND IS SLIDBALY INTERLOCKED TO AT LEAST A PART OF THE UNDERSIDE OF THE SUPPORT SHEET, TENSIONED, PARALLEL GUY MEANS IMMOVABLY FASTENED TO THE BASE SHEET ADJACENT ITS RESPECTIVE EDGES, WHICH GUY MEANS CROSS TO THE RESPECTIVE OPPOSITE EDGES OF THE BASE SHEET AT THE HEADER, WITH GUIDE MEANS FASTENED TO THE HEADER ADJACENT ITS ENDS AROUND WHICH THE GUY MEANS ARE SEPARATELY LOCATED AND FLEX AND MAINTAIN THE HEADER PARALLEL TO THE TOP EDGE OF THE BOARD AS IT IS MOVED TOWARD AND AWAY FROM SAID TOP EDGE.
Claim 2
Independent Claim
139 words
A DEVICE FOR USE WITH A DRAWING BOARD WHICH COMPRISES A FLEXIBLE SUPPORT SHEET, A HEADER PARALLEL TO THE TOP EDGE OF THE BOARD AND EXTENDING ACROSS THE SUPPORT SHEET AND FASTENED THERETO, A BASE SHEET WITH SUBSTANIALLY PARALLEL EDGES WHICH IS ADAPTED TO BE MOUNTED ON THE DRAWING BOARD AND IS SLIDBALY INTERLOCKED TO AT LEAST A PART OF THE UNDERSIDE OF THE SUPPORT SHEET, TENSIONED, PARALLEL GUY MEANS IMMOVABLY FASTENED TO THE BASE SHEET ADJACENT ITS RESPECTIVE EDGES, WHICH GUY MEANS CROSS TO THE RESPECTIVE OPPOSITE EDGES OF THE BASE SHEET AT THE HEADER, WITH GUIDE MEANS FASTENED TO THE HEADER ADJACENT ITS ENDS AROUND WHICH THE GUY MEANS ARE SEPARATELY LOCATED AND FLEX AND MAINTAIN THE HEADER PARALLEL TO THE TOP EDGE OF THE BOARD AS IT IS MOVED TOWARD AND AWAY FROM SAID TOP EDGE.
References Cited (Backward Citations)
US2703468A
Cited
US2896360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |